Update JaCoCo Maven plugin (0.8.5 -> 0.8.6)
Update JaCoCo Maven plugin (0.8.5 -> 0.8.6)

This update is needed in order to build with Java 15 and Zulu JVM.

The build was failing for ubuntu-18.04 with Zulu15.27+17-CA (build 15+36).

JaCoCo 0.8.6 has experimental support for Java 15 among other features.

Without this update the build will fail since tests are executed with the
JaCoCo agent and some JVM clases loaded in runtime have major version 59.

Test with problems: `br.usp.each.saeg.badua.test.validation.StaticField2SourceTest`

See also: c56d2af3c888dc82addd7d9f2196120fbc271dbb

Stacktrace:
```
java.lang.instrument.IllegalClassFormatException: Error while instrumenting sun/util/resources/cldr/provider/CLDRLocaleDataMetaInfo.
	at org.jacoco.agent.rt.internal_43f5073.CoverageTransformer.transform(CoverageTransformer.java:94)
	at java.instrument/java.lang.instrument.ClassFileTransformer.transform(ClassFileTransformer.java:246)
	at java.instrument/sun.instrument.TransformerManager.transform(TransformerManager.java:188)
	at java.instrument/sun.instrument.InstrumentationImpl.transform(InstrumentationImpl.java:563)
	at java.base/java.lang.ClassLoader.defineClass2(Native Method)
	at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1108)
	at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:183)
	at java.base/jdk.internal.loader.BuiltinClassLoader.defineClass(BuiltinClassLoader.java:784)
	at java.base/jdk.internal.loader.BuiltinClassLoader.findClassInModuleOrNull(BuiltinClassLoader.java:705)
	at java.base/jdk.internal.loader.BuiltinClassLoader.findClass(BuiltinClassLoader.java:586)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:634)
	at java.base/java.lang.Class.forName(Class.java:546)
	at java.base/java.util.ServiceLoader.loadProvider(ServiceLoader.java:854)
	at java.base/java.util.ServiceLoader$ModuleServicesLookupIterator.hasNext(ServiceLoader.java:1078)
	at java.base/java.util.ServiceLoader$2.hasNext(ServiceLoader.java:1301)
	at java.base/java.util.ServiceLoader$3.hasNext(ServiceLoader.java:1386)
	at java.base/sun.util.cldr.CLDRLocaleProviderAdapter$1.run(CLDRLocaleProviderAdapter.java:89)
	at java.base/sun.util.cldr.CLDRLocaleProviderAdapter$1.run(CLDRLocaleProviderAdapter.java:86)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:554)
	at java.base/sun.util.cldr.CLDRLocaleProviderAdapter.<init>(CLDRLocaleProviderAdapter.java:86)
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:64)
	at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500)
	at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:481)
	at java.base/sun.util.locale.provider.LocaleProviderAdapter.forType(LocaleProviderAdapter.java:188)
	at java.base/sun.util.locale.provider.LocaleProviderAdapter.findAdapter(LocaleProviderAdapter.java:287)
	at java.base/sun.util.locale.provider.LocaleProviderAdapter.getAdapter(LocaleProviderAdapter.java:258)
	at java.base/java.text.DecimalFormatSymbols.getInstance(DecimalFormatSymbols.java:180)
	at java.base/java.util.Formatter.getZero(Formatter.java:2437)
	at java.base/java.util.Formatter.<init>(Formatter.java:1956)
	at java.base/java.util.Formatter.<init>(Formatter.java:1978)
	at java.base/java.lang.String.format(String.java:3292)
	at org.junit.runner.Description.formatDisplayName(Description.java:114)
	at org.junit.runner.Description.createTestDescription(Description.java:86)
	at org.junit.runners.BlockJUnit4ClassRunner.describeChild(BlockJUnit4ClassRunner.java:96)
	at org.junit.runners.BlockJUnit4ClassRunner.describeChild(BlockJUnit4ClassRunner.java:57)
	at org.junit.runners.ParentRunner.getDescription(ParentRunner.java:352)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:359)
	at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:252)
	at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:141)
	at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:112)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:564)
	at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:189)
	at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:165)
	at org.apache.maven.surefire.booter.ProviderFactory.invokeProvider(ProviderFactory.java:85)
	at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:115)
	at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:75)
Caused by: java.io.IOException: Error while instrumenting sun/util/resources/cldr/provider/CLDRLocaleDataMetaInfo.
	at org.jacoco.agent.rt.internal_43f5073.core.instr.Instrumenter.instrumentError(Instrumenter.java:159)
	at org.jacoco.agent.rt.internal_43f5073.core.instr.Instrumenter.instrument(Instrumenter.java:109)
	at org.jacoco.agent.rt.internal_43f5073.CoverageTransformer.transform(CoverageTransformer.java:92)
	... 50 more
Caused by: java.lang.IllegalArgumentException: Unsupported class file major version 59
	at org.jacoco.agent.rt.internal_43f5073.asm.ClassReader.<init>(ClassReader.java:195)
	at org.jacoco.agent.rt.internal_43f5073.asm.ClassReader.<init>(ClassReader.java:176)
	at org.jacoco.agent.rt.internal_43f5073.asm.ClassReader.<init>(ClassReader.java:162)
	at org.jacoco.agent.rt.internal_43f5073.core.internal.instr.InstrSupport.classReaderFor(InstrSupport.java:280)
	at org.jacoco.agent.rt.internal_43f5073.core.instr.Instrumenter.instrument(Instrumenter.java:75)
	at org.jacoco.agent.rt.internal_43f5073.core.instr.Instrumenter.instrument(Instrumenter.java:107)
	... 51 more
```

Stacktrace:
```
java.util.ServiceConfigurationError: Locale provider adapter "CLDR"cannot be instantiated.
	at java.base/sun.util.locale.provider.LocaleProviderAdapter.forType(LocaleProviderAdapter.java:199)
	at java.base/sun.util.locale.provider.LocaleProviderAdapter.findAdapter(LocaleProviderAdapter.java:287)
	at java.base/sun.util.locale.provider.LocaleProviderAdapter.getAdapter(LocaleProviderAdapter.java:258)
	at java.base/java.text.DecimalFormatSymbols.getInstance(DecimalFormatSymbols.java:180)
	at java.base/java.util.Formatter.getZero(Formatter.java:2437)
	at java.base/java.util.Formatter.<init>(Formatter.java:1956)
	at java.base/java.util.Formatter.<init>(Formatter.java:1978)
	at java.base/java.lang.String.format(String.java:3292)
	at org.junit.runner.Description.formatDisplayName(Description.java:114)
	at org.junit.runner.Description.createTestDescription(Description.java:86)
	at org.junit.runners.BlockJUnit4ClassRunner.describeChild(BlockJUnit4ClassRunner.java:96)
	at org.junit.runners.BlockJUnit4ClassRunner.describeChild(BlockJUnit4ClassRunner.java:57)
	at org.junit.runners.ParentRunner.getDescription(ParentRunner.java:352)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:359)
	at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:252)
	at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:141)
	at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:112)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:564)
	at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:189)
	at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:165)
	at org.apache.maven.surefire.booter.ProviderFactory.invokeProvider(ProviderFactory.java:85)
	at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:115)
	at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:75)
Caused by: java.lang.reflect.InvocationTargetException
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:64)
	at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500)
	at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:481)
	at java.base/sun.util.locale.provider.LocaleProviderAdapter.forType(LocaleProviderAdapter.java:188)
	... 25 more
Caused by: java.util.ServiceConfigurationError: sun.util.locale.provider.LocaleDataMetaInfo: Unable to load sun.util.resources.cldr.provider.CLDRLocaleDataMetaInfo
	at java.base/java.util.ServiceLoader.fail(ServiceLoader.java:584)
	at java.base/java.util.ServiceLoader.loadProvider(ServiceLoader.java:856)
	at java.base/java.util.ServiceLoader$ModuleServicesLookupIterator.hasNext(ServiceLoader.java:1078)
	at java.base/java.util.ServiceLoader$2.hasNext(ServiceLoader.java:1301)
	at java.base/java.util.ServiceLoader$3.hasNext(ServiceLoader.java:1386)
	at java.base/sun.util.cldr.CLDRLocaleProviderAdapter$1.run(CLDRLocaleProviderAdapter.java:89)
	at java.base/sun.util.cldr.CLDRLocaleProviderAdapter$1.run(CLDRLocaleProviderAdapter.java:86)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:554)
	at java.base/sun.util.cldr.CLDRLocaleProviderAdapter.<init>(CLDRLocaleProviderAdapter.java:86)
	... 31 more
Caused by: java.lang.LinkageError: loader 'platform' attempted duplicate class definition for sun.util.resources.cldr.provider.CLDRLocaleDataMetaInfo. (sun.util.resources.cldr.provider.CLDRLocaleDataMetaInfo is in module jdk.localedata of loader 'platform')
	at java.base/java.lang.ClassLoader.defineClass2(Native Method)
	at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1108)
	at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:183)
	at java.base/jdk.internal.loader.BuiltinClassLoader.defineClass(BuiltinClassLoader.java:784)
	at java.base/jdk.internal.loader.BuiltinClassLoader.findClassInModuleOrNull(BuiltinClassLoader.java:705)
	at java.base/jdk.internal.loader.BuiltinClassLoader.findClass(BuiltinClassLoader.java:586)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:634)
	at java.base/java.lang.Class.forName(Class.java:546)
	at java.base/java.util.ServiceLoader.loadProvider(ServiceLoader.java:854)
	... 38 more
Caused by: java.lang.reflect.InvocationTargetException
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:64)
	at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500)
	at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:481)
	at java.base/sun.util.locale.provider.LocaleProviderAdapter.forType(LocaleProviderAdapter.java:188)
	... 25 more
Caused by: java.util.ServiceConfigurationError: sun.util.locale.provider.LocaleDataMetaInfo: Unable to load sun.util.resources.cldr.provider.CLDRLocaleDataMetaInfo
	at java.base/java.util.ServiceLoader.fail(ServiceLoader.java:584)
	at java.base/java.util.ServiceLoader.loadProvider(ServiceLoader.java:856)
	at java.base/java.util.ServiceLoader$ModuleServicesLookupIterator.hasNext(ServiceLoader.java:1078)
	at java.base/java.util.ServiceLoader$2.hasNext(ServiceLoader.java:1301)
	at java.base/java.util.ServiceLoader$3.hasNext(ServiceLoader.java:1386)
	at java.base/sun.util.cldr.CLDRLocaleProviderAdapter$1.run(CLDRLocaleProviderAdapter.java:89)
	at java.base/sun.util.cldr.CLDRLocaleProviderAdapter$1.run(CLDRLocaleProviderAdapter.java:86)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:554)
	at java.base/sun.util.cldr.CLDRLocaleProviderAdapter.<init>(CLDRLocaleProviderAdapter.java:86)
	... 31 more
Caused by: java.lang.LinkageError: loader 'platform' attempted duplicate class definition for sun.util.resources.cldr.provider.CLDRLocaleDataMetaInfo. (sun.util.resources.cldr.provider.CLDRLocaleDataMetaInfo is in module jdk.localedata of loader 'platform')
	at java.base/java.lang.ClassLoader.defineClass2(Native Method)
	at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1108)
	at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:183)
	at java.base/jdk.internal.loader.BuiltinClassLoader.defineClass(BuiltinClassLoader.java:784)
	at java.base/jdk.internal.loader.BuiltinClassLoader.findClassInModuleOrNull(BuiltinClassLoader.java:705)
	at java.base/jdk.internal.loader.BuiltinClassLoader.findClass(BuiltinClassLoader.java:586)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:634)
	at java.base/java.lang.Class.forName(Class.java:546)
	at java.base/java.util.ServiceLoader.loadProvider(ServiceLoader.java:854)
	... 38 more
```

saeg/ba-dua