rename enum to enumerate

[andrenarchy]

See #11

[codecov-io]

Codecov Report

Merging #12 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master      #12   +/-   ##
=======================================
  Coverage   97.46%   97.46%           
=======================================
  Files          14       14           
  Lines         158      158           
  Branches       52       52           
=======================================
  Hits          154      154           
  Misses          4        4

Impacted Files	Coverage Δ
src/index.ts	100% <100%> (ø)	⬆️
src/enumerate.ts	100% <100%> (ø)

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