Add .babelrc to .npmignore

[maxdavidson]

When using amazon-cognito-identity-js with React Native, it tries to transpile the code using the published .babelrc file. It will choke if babel-preset-es2015 is not installed. This is unfortunately how RN's bundler works by default. By npmignoring it, the problem should be resolved.

See facebook/react-native#4062

[codecov-io]

Codecov Report

Merging #317 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #317   +/-   ##
=======================================
  Coverage   89.27%   89.27%           
=======================================
  Files          69       69           
  Lines        3217     3217           
  Branches      611      611           
=======================================
  Hits         2872     2872           
  Misses        328      328           
  Partials       17       17

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[richardzcode]

👍

[simonbuchan]

As a follow up, I'm not sure what triggers this, but doing this seems to also fix the redbox error: Unhandled JS Exception: Unexpected token '{'. import call expects exactly one argument. (http://localhost:8081/index.bundle?platform=ios&dev=true&minify=false:196509) though it requires --reset-cache to flush out the old, bad transpilation.

[github-actions]

This pull request has been automatically locked since there hasn't been any recent activity after it was closed. Please open a new issue for related bugs.

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