Replace deprecated bundler platforms :mingw, :x64_mingw, :mswin with :windows

Author: michaelnordmeyer

Gemfile

@@ -21,13 +21,13 @@ end
 
 # Windows and JRuby does not include zoneinfo files, so bundle the tzinfo-data gem
 # and associated library.
-platforms :mingw, :x64_mingw, :mswin, :jruby do
+platforms :windows, :jruby do
   gem "tzinfo", ">= 1", "< 3"
   gem "tzinfo-data"
 end
 
 # Performance-booster for watching directories on Windows
-gem "wdm", "~> 0.1.1", :platforms => [:mingw, :x64_mingw, :mswin]
+gem "wdm", "~> 0.1.1", :platforms => [:windows]
 
 # Lock `http_parser.rb` gem to `v0.6.x` on JRuby builds since newer versions of the gem
 # do not have a Java counterpart.