Add line ending enum to lib #122

Job	Run time	Billable time
doc	20s	0s
check-minimal	20s	0s
check	14s	0s
format	20s	0s
test (stable, --no-default-features)	10s	0s
test (stable, --no-default-features --features "test")	18s	0s
test (stable, --no-default-features --features "termcolor")	18s	0s
test (stable)	20s	0s
test (stable, --all-features)	23s	0s
test (beta, --no-default-features)	23s	0s
test (beta, --no-default-features --features "test")	23s	0s
test (beta, --no-default-features --features "termcolor")	22s	0s
test (beta)	17s	0s
test (beta, --all-features)	20s	0s
test (nightly, --no-default-features)	22s	0s
test (nightly, --no-default-features --features "test")	21s	0s
test (nightly, --no-default-features --features "termcolor")	18s	0s
test (nightly)	17s	0s
test (nightly, --all-features)	17s	0s
tarpaulin	6s	0s
publish	0s	0s
	6m 9s	0s

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