chore(main): release launchdarkly-java-sdk-internal 1.8.0 (#138) #355

Job	Run time
test-packaging	4m 56s
test-platforms-and-versions (ubuntu-latest, 19)	3m 41s
test-platforms-and-versions (ubuntu-latest, 17)	3m 43s
test-platforms-and-versions (ubuntu-latest, 11)	3m 58s
test-contract-tests	4m 28s
test-platforms-and-versions (ubuntu-latest, 8)	3m 54s
	24m 40s

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