Restored migration template method return types #2160
Merged
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I previously added this in #1819 but it was (inadvertently?) reverted in #1995, which claimed to be adding type hints, but actually removed them, at least in migration templates, as we can see in this commit. That commit purports to be fixing tests, but as we can see from this PR, no tests (at least at the present time) are broken by adding such types.
Since Phinx currently requires PHP 7.2, and void functions were added in PHP 7.1, there doesn't seem to be a compelling reason to not to add these types.