* updated java indexer dependencies
* replaced old gradle tooling jar that is shipped with Sourcetrail because it is not working for new JRE versions anymore
* fixed crash in Java indexer
* added language standard sleection for Java 13, 14 and 15
* fixed console logging for recent jdk versions
* added new location type
* refactored old recording code
* record signature locations for cxx functions and java methods
* added signature locations to sample project indexer tests
* ignore signature locations in ui
* signatures in tooltip with qualified name of the function/method
* added test for finding signature location of constructor with initializer list
* fixed java indexer to continue working when a dependency path does not exist
* updated JavSymbolSolver with a lot of fixes for solving types that are defined inside jar files
* update JavaSymbolSolver to version 0.6.0
* moved to Javaparser 3.3.0
* fixed solving type parameter names in symbols solved in jar files
* implemented ignoring name contexts in javassist and jre based method signatures to break infinite recursion