Add SepReaderOptions.ColNameComparer #336

Job	Run time
test-parsers (ubuntu-latest, Debug)	5m 8s
pack	1m 49s
test-parsers (ubuntu-latest, Release)	5m 2s
build (ubuntu-latest, Debug)	1m 46s
test-parsers (windows-latest, Debug)	5m 43s
build (ubuntu-latest, Release)	57s
test-parsers (windows-latest, Release)	5m 58s
build (windows-latest, Debug)	2m 13s
build (windows-latest, Release)	2m 24s
build (macos-latest, Debug)	1m 30s
test-parsers (macos-latest, Debug)	9m 41s
build (macos-latest, Release)	1m 44s
test-parsers (macos-latest, Release)	5m 17s
create-release-push	0s
	49m 12s

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