Add ParallelEnumerate overloads with degreeOfParallism #313

Job	Run time
pack	1m 15s
build (ubuntu-latest, Debug)	1m 20s
test-parsers (ubuntu-latest, Debug)	4m 34s
build (ubuntu-latest, Release)	1m 2s
test-parsers (ubuntu-latest, Release)	4m 24s
build (windows-latest, Debug)	2m 45s
test-parsers (windows-latest, Debug)	6m 18s
build (windows-latest, Release)	1m 52s
test-parsers (windows-latest, Release)	5m 32s
build (macos-latest, Debug)	1m 12s
test-parsers (macos-latest, Debug)	4m 14s
build (macos-latest, Release)	1m 1s
test-parsers (macos-latest, Release)	9m 26s
create-release-push	0s
	44m 55s

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