fix: snapshots ansi serialization #17
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What:
Change snapshots serializer to strip away all ansi codes.
Why:
Because the terminal output stored I these snapshots is not the same in terminals where colors are not supported, such as in Travis-CI.
How:
Using this jest custom snapshot serializer: https://github.com/joaogranado/jest-serializer-ansi
Checklist: