Drop trivial activesupport requirement

lib/powershell.rb

@@ -1,5 +1,3 @@
-require 'active_support/core_ext/string/inflections'
-
 class PowershellCommand
   attr_accessor :script, :working_directory, :execution_policy, :script_parameters
 
@@ -24,7 +22,7 @@ def command
     params.push("#{script.gsub(working_directory, '.')}.ps1")
 
     script_parameters.each do |param, value|
-      switch_name = param.to_s.camelize(:upper)
+      switch_name = param.to_s.split('_').map { |x| x.capitalize }.join
 
       if !!value == value
         params.push("-#{switch_name}:$#{value}")

powershell.gemspec

@@ -7,6 +7,4 @@ Gem::Specification.new do |s|
   s.email        = '[email protected]'
   s.files        = ['lib/powershell.rb']
   s.homepage     = 'http://github.com/skilitix/powershell'
-
-  s.add_dependency('activesupport', '>= 3.2.12')
 end