New rule: `no-flow-fix-me-in-strict-files`

[nvie]

This rule validates that no error suppression comments (e.g. $FlowFixMe) are used in // @flow strict (or // @flow strict-local) files.

This codifies the best practices as documented here:

It's a simple rule without any options.

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@gajus I followed all of the contributing guidelines, adding documentation and tests, but I failed at the last step while running npm run create-readme. See my error log here.