Early exit when no files are changed. (#456)
* Early exit when no files are changed.
As a consequence of the `checkAll` function call returning `true` if the length of `changedFiles` is 0, this must early-exit in order to avoid labeling empty PRs.
* Update dist.
* Update for new code styles.
* review changes requested
* Update dist.
* chore: prettify code
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Co-authored-by: MaksimZhukov <maksimzhukov@github.com>
Co-authored-by: IvanZosimov <ivanzosimov@github.com>
