Update .gitignore

Make findMin and findMax tail-recursive (#122)

Use foldable-traversable^3.4.0 (#120)

stack-safe fromFoldable (#110)

with benchmarks that reflect no performance degradation

addresses #108

size in log(n) (#107)

* size benchmarks

addresses #101

* size through log(n) traversal

addresses #100

Merge pull request #109 from purescript/gen

Add generators for `Map` and `StrMap`

persistent map filters and isSubMap (#99)

* persistent map filters and isSubMap

* rename filter fns following review

#97 (review)