v3.7.0-alpha3

From Release notes from jmonkeyengine: link to original post

A non-production release, for development and testing only, not intended to be used in any product. Largely untested, without complete/reliable documentation, and without SDK support. Vital features may be missing. The feature set, API, and serialization format might change before the next release.

Changes relative to v3.7.0-alpha2:

• update Groovy to v3.0.21 by @stephengold in #2212
• don't code the Gradle version in build.gradle by @stephengold in #2213
• jme3-examples: add the TestIssue2209 class by @stephengold in #2214
• Use precision qualifiers only in GL ES shaders by @riccardobl in #2217
• Added Test Class for SingleLayerInfluenceMask by @codex128 in #2218

Full Changelog: v3.7.0-alpha2...v3.7.0-alpha3