Bump gettext from 0.15.0 to 0.16.0
Bump gettext from 0.15.0 to 0.16.0

Bumps [gettext](https://github.com/elixir-lang/gettext) from 0.15.0 to 0.16.0.
- [Release notes](https://github.com/elixir-lang/gettext/releases)
- [Changelog](https://github.com/elixir-lang/gettext/blob/master/CHANGELOG.md)
- [Commits](https://github.com/elixir-lang/gettext/compare/v0.15.0...v0.16.0)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
bors-ng/bors-ng,bors-ng/bors-ng,bors-ng/bors-ng