Update wdm requirement from ~> 0.1.1 to ~> 0.2.0

Updates the requirements on [wdm](https://github.com/Maher4Ever/wdm) to permit the latest version.
- [Release notes](https://github.com/Maher4Ever/wdm/releases)
- [Commits](Maher4Ever/wdm@v0.1.1...v0.2.0)

---
updated-dependencies:
- dependency-name: wdm
  dependency-version: 0.2.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Gemfile

@@ -20,5 +20,5 @@ install_if -> { RUBY_PLATFORM =~ %r!mingw|mswin|java! } do
 end
 
 # Performance-booster for watching directories on Windows
-gem "wdm", "~> 0.1.1", :install_if => Gem.win_platform?
+gem "wdm", "~> 0.2.0", :install_if => Gem.win_platform?
 gem "webrick", "~> 1.7"