Bump plug from 1.8.0 to 1.8.2 (#455)
Bump plug from 1.8.0 to 1.8.2 (#455)

Bumps [plug](https://github.com/elixir-plug/plug) from 1.8.0 to 1.8.2.
- [Release notes](https://github.com/elixir-plug/plug/releases)
- [Changelog](https://github.com/elixir-plug/plug/blob/master/CHANGELOG.md)
- [Commits](https://github.com/elixir-plug/plug/compare/v1.8.0...v1.8.2)
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