Update Gemfile - Bump wdm to 0.2.0

Author: Sanrax

Gemfile

@@ -24,7 +24,7 @@ install_if -> { RUBY_PLATFORM =~ %r!mingw|mswin|java! } do
 end
 
 # Performance-booster for watching directories on Windows
-gem "wdm", "~> 0.1.0", :install_if => Gem.win_platform?
+gem "wdm", "~> 0.2.0", :install_if => Gem.win_platform?
 
 gem "webrick", "~> 1.8", ">= 1.8.1"