update maven-compiler-plugin version to make it consistent with library
update maven-compiler-plugin version to make it consistent with library

AzureAD/azure-activedirectory-library-for-android,iambmelt/azure-activedirectory-library-for-android,thewulf7/adal-extended,thewulf7/adal-extended,AzureAD/azure-activedirectory-library-for-android,iambmelt/azure-activedirectory-library-for-android