refactor: remove NOENT option for security

NOENT, which is used to substitute entities also enables processing of
both regular and external entities. Which seems risky when you don't
the XML source. NONET will have no effect if used with NOENT.

- Github Issue: ckruse#55

lib/cfpropertylist/rbLibXMLParser.rb

@@ -5,7 +5,7 @@
 module CFPropertyList
   # XML parser
   class LibXMLParser < XMLParserInterface
-    PARSER_OPTIONS = LibXML::XML::Parser::Options::NOBLANKS|LibXML::XML::Parser::Options::NOENT|LibXML::XML::Parser::Options::NONET
+    PARSER_OPTIONS = LibXML::XML::Parser::Options::NOBLANKS|LibXML::XML::Parser::Options::NONET
     # read a XML file
     # opts::
     # * :file - The filename of the file to load

lib/cfpropertylist/rbNokogiriParser.rb

@@ -5,7 +5,7 @@
 module CFPropertyList
   # XML parser
   class NokogiriXMLParser < ParserInterface
-    PARSER_OPTIONS = Nokogiri::XML::ParseOptions::NOBLANKS|Nokogiri::XML::ParseOptions::NOENT|Nokogiri::XML::ParseOptions::NONET
+    PARSER_OPTIONS = Nokogiri::XML::ParseOptions::NOBLANKS|Nokogiri::XML::ParseOptions::NONET
     # read a XML file
     # opts::
     # * :file - The filename of the file to load