fix: stop duplicating names on case-insensitive file systems#192

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j03m wants to merge 2 commits intobcoe:masterfrom

j03m:path-casing-win32

Commits on Jan 25, 2020

[fix] win32 mismatch of path casings causes duplicate entries
j03m
committed

Commits on Jan 27, 2020

minor: Set.add should return itself per spec
j03m
committed