main.yml: limit continuous integration to recent release branches

JoystickCompatibilityMappings: @author can't be used in method javadoc

fix issue jMonkeyEngine#1496 2nd try (Android natives missing from JARs)

fix issue jMonkeyEngine#1496 (Android natives missing from JARs at Ma…

…venCentral)

Added profile tracking to AppStateManager for render and post render. (…

…jMonkeyEngine#1485)

testcase and fix for issue jMonkeyEngine#1388 (Quaternion javadoc is …

…misleading) (jMonkeyEngine#1451)

* testcase and fix for issue jMonkeyEngine#1388 (Quaternion javadoc is misleading)

* privatize 2 methods to please Codacy

* Quaternion: distinguish intrinsic-vs-extrinsic rotation order in cmts

* TestIssue1388: verify intrinsic rotation order

main.yml: remove trailing whitespace

main.yml: deploy the artifacts from each release to Sonatype

make TestMorph (in jme3-examples) more user-friendly

Update checkout action to v2