update parser

remove pesty warnings

Gemfile.lock

@@ -8,7 +8,7 @@ PATH
   remote: .
   specs:
     rubyx (0.6.0)
-      parser (~> 2.5.0)
+      parser (~> 2.6.0)
       rx-file (~> 0.3)
 
 GEM
@@ -53,7 +53,7 @@ GEM
     notiffany (0.1.3)
       nenv (~> 0.1)
       shellany (~> 0.0)
-    parser (2.5.3.0)
+    parser (2.6.5.0)
       ast (~> 2.4.0)
     pry (0.12.2)
       coderay (~> 1.1.0)
@@ -92,4 +92,4 @@ DEPENDENCIES
   thor
 
 BUNDLED WITH
-   2.0.2
+   2.1.4

rubyx.gemspec

@@ -13,6 +13,6 @@ Gem::Specification.new do |s|
   s.require_paths = ['lib']
   s.summary = 'RubyX is a native object vm without any c, one day possibly a ruby vm'
 
-  s.add_dependency "parser" , "~> 2.5.0"
+  s.add_dependency "parser" , "~> 2.6.0"
   s.add_dependency "rx-file" , "~> 0.3"
 end