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Add extension `jackson-jr-extension-javatime` to support (some) Java 8 date/time types #207

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Run time

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Job	Run time
build (8, ubuntu-20.04)	2m 43s
build (11, ubuntu-20.04)	42s
build (17, ubuntu-20.04)	34s
build (21, ubuntu-20.04)	38s
	4m 37s