rename conditional to control in parser

lib/ast/conditional_expression.rb

@@ -12,6 +12,4 @@ module Ast
       [:cond, :if_true, :if_false]
     end
   end
-
-  
 end

lib/parser/control.rb

@@ -1,5 +1,5 @@
 module Parser
-  module Conditional
+  module Control
     include Parslet
     rule(:conditional) do
       keyword_if >> left_parenthesis >> expression.as(:conditional) >> right_parenthesis >> newline >>

lib/parser/crystal.rb

@@ -1,7 +1,7 @@
 require_relative "basic_types"
 require_relative "tokens"
 require_relative "keywords"
-require_relative "conditional"
+require_relative "control"
 require_relative "expression"
 require_relative "function_call"
 require_relative "function_definition"
@@ -21,7 +21,7 @@ module Parser
     include BasicTypes
     include Tokens
     include Keywords
-    include Conditional
+    include Control
     include Expression
     include FunctionCall
     include FunctionDefinition