Refactors stringify_keys to a utils file

lib/blanket/utils.rb

@@ -0,0 +1,5 @@
+module Blanket
+  def self.stringify_keys(hash)
+    hash.inject({}) {|memo,(k,v)| memo[k.to_s] = v; memo}
+  end
+end

lib/blanket/wrapper.rb

@@ -1,3 +1,5 @@
+require_relative "utils"
+
 module Blanket
   class Wrapper
     class << self
@@ -61,7 +63,7 @@ def request(method, id=nil, options={})
         id = nil
       end
 
-      headers = merged_headers(options[:headers])
+      headers = Blanket.stringify_keys merged_headers(options[:headers])
       params = merged_params(options[:params])
       uri = uri_from_parts([id])
 
@@ -71,7 +73,7 @@ def request(method, id=nil, options={})
 
       response = HTTParty.public_send(method, uri, {
         query:   params,
-        headers: stringify_keys(headers),
+        headers: headers,
         body:    options[:body]
       }.reject { |_, value| value.nil? || value.empty? })
 
@@ -94,9 +96,5 @@ def merged_params(params)
     def uri_from_parts(parts)
       File.join @base_uri, *parts.compact.map(&:to_s)
     end
-
-    def stringify_keys(hash)
-      hash.inject({}) {|memo,(k,v)| memo[k.to_s] = v; memo}
-    end
   end
 end