Add line ending enum to lib #121

Job	Run time	Billable time
format	15s	0s
check	14s	0s
check-minimal	16s	0s
doc	38s	0s
test (stable, --no-default-features)	25s	0s
test (stable, --no-default-features --features "test")	18s	0s
test (stable, --no-default-features --features "termcolor")	23s	0s
test (stable)	22s	0s
test (stable, --all-features)	21s	0s
test (beta, --no-default-features)	30s	0s
test (beta, --no-default-features --features "test")	20s	0s
test (beta, --no-default-features --features "termcolor")	47s	0s
test (beta)	21s	0s
test (beta, --all-features)	26s	0s
test (nightly, --no-default-features)	24s	0s
test (nightly, --no-default-features --features "test")	39s	0s
test (nightly, --no-default-features --features "termcolor")	28s	0s
test (nightly)	24s	0s
test (nightly, --all-features)	24s	0s
tarpaulin	17s	0s
publish	0s	0s
	8m 12s	0s

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