Define GitHub Actions workflows #15

Job	Run time
Gradle Wrapper Validation	4s
Compile against JDKs and OSes (ubuntu-latest, 8)	34s
Compile against JDKs and OSes (ubuntu-latest, 11)	40s
Compile against JDKs and OSes (ubuntu-latest, 17)	36s
Compile against JDKs and OSes (ubuntu-latest, 21)	39s
Compile against JDKs and OSes (ubuntu-latest, 23)	39s
Compile against JDKs and OSes (macos-latest, 11)	36s
Compile against JDKs and OSes (macos-latest, 17)	36s
Compile against JDKs and OSes (macos-latest, 21)	39s
Compile against JDKs and OSes (macos-latest, 23)	44s
Test (8, 2.8.11)	48s
Test (8, 2.9.10)	42s
Test (8, 2.10.4)	47s
Test (8, 2.11.3)	42s
Test (8, 2.12.3)	1m 1s
Test (8, 2.13.4)	22s
Test (8, 2.14.1)	27s
Test (11, 2.8.11)	43s
Test (11, 2.9.10)	47s
Test (11, 2.10.4)	51s
Test (11, 2.11.3)	50s
Test (11, 2.12.3)	44s
Test (11, 2.13.4)	27s
Test (11, 2.14.1)	24s
Test (17, 2.8.11)	54s
Test (17, 2.9.10)	40s
Test (17, 2.10.4)	40s
Test (17, 2.11.3)	49s
Test (17, 2.12.3)	43s
Test (17, 2.13.4)	30s
Test (17, 2.14.1)	32s
Test (21, 2.8.11)	43s
Test (21, 2.9.10)	50s
Test (21, 2.10.4)	41s
Test (21, 2.11.3)	54s
Test (21, 2.12.3)	40s
Test (21, 2.13.4)	30s
Test (21, 2.14.1)	24s
Test (23, 2.8.11)	43s
Test (23, 2.9.10)	43s
Test (23, 2.10.4)	45s
Test (23, 2.11.3)	43s
Test (23, 2.12.3)	43s
Test (23, 2.13.4)	39s
Test (23, 2.14.1)	27s
	29m 35s

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