Add short MIT license header to all source files

[AlexMSmithCA]

Created with fusion-orchestrate.

[codecov]

Codecov Report

Merging #33 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #33   +/-   ##
=======================================
  Coverage   65.87%   65.87%           
=======================================
  Files           8        8           
  Lines         126      126           
  Branches       30       30           
=======================================
  Hits           83       83           
  Misses         33       33           
  Partials       10       10

Impacted Files	Coverage Δ
src/constants.js	100% <ø> (ø)	⬆️
src/dispatched.js	25% <ø> (ø)	⬆️
src/plugin.js	0% <ø> (ø)	⬆️
src/split.js	62.16% <ø> (ø)	⬆️
src/utils/isReactCompositeComponent.js	50% <ø> (ø)	⬆️
src/prepare.js	86.11% <ø> (ø)	⬆️
src/prepared.js	61.9% <ø> (ø)	⬆️
src/prepare-provider.js	100% <ø> (ø)	⬆️

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