Fix move swap

[erikras]

Fixes #10.

[codecov]

Codecov Report

Merging #14 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master    #14   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           8      8           
  Lines          48     77   +29     
  Branches       10     15    +5     
=====================================
+ Hits           48     77   +29

Impacted Files	Coverage Δ
src/unshift.js	100% <ø> (ø)	⬆️
src/push.js	100% <ø> (ø)	⬆️
src/shift.js	100% <100%> (ø)	⬆️
src/pop.js	100% <100%> (ø)	⬆️
src/insert.js	100% <100%> (ø)	⬆️
src/move.js	100% <100%> (ø)	⬆️
src/swap.js	100% <100%> (ø)	⬆️
src/remove.js	100% <100%> (ø)	⬆️

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[erikras]

Published in v1.1.0.