Update the debugger gem to include new sources

Author: PragTob

Gemfile.lock

@@ -64,7 +64,7 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.7.0)
-    columnize (0.3.6)
+    columnize (0.9.0)
     coveralls (0.7.0)
       multi_json (~> 1.3)
       rest-client
@@ -83,12 +83,12 @@ GEM
       nokogiri (>= 1.5.0)
       rails (>= 3.0.0)
     database_cleaner (1.2.0)
-    debugger (1.6.5)
+    debugger (1.6.8)
       columnize (>= 0.3.1)
       debugger-linecache (~> 1.2.0)
-      debugger-ruby_core_source (~> 1.3.1)
+      debugger-ruby_core_source (~> 1.3.5)
     debugger-linecache (1.2.0)
-    debugger-ruby_core_source (1.3.2)
+    debugger-ruby_core_source (1.3.8)
     devise (2.2.8)
       bcrypt-ruby (~> 3.0)
       orm_adapter (~> 0.1)