Update the Gradle wrapper's version
Currently, the Gradle wrapper version used is 2.10. I'd like to use the latest version, which is Gradle 7.1.1. It is necessary, as my IDE does not support Gradle versions that old. Also, newer versions allow the use of newer JDKs. See the the following GitHub issue : https://github.com/Simsilica/SimMath/issues/2#issuecomment-896918407
Original intent
References
See the forum discussion : https://hub.jmonkeyengine.org/t/simmath-vec3i-contribution/44833
Related to the following issues : #2