Update version of org.reflections:reflections
Update version of org.reflections:reflections

`reflections:0.9.10` depends on guava 18, which contains a denial of
service vulnerability:

* http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-10237

`reflections:0.9.11 ` depends on guava 20
(https://github.com/ronmamo/reflections/blob/master/pom.xml#L55) which
does not contain the mentioned vulnerability and is still Java 7
compatible (https://github.com/google/guava/wiki/Release21#java-8)

fabiomaffioletti/jsondoc,fabiomaffioletti/jsondoc,fabiomaffioletti/jsondoc,fabiomaffioletti/jsondoc