Add .redcode extension

Author: ian-h-chamberlain

CHANGELOG.md

@@ -9,6 +9,10 @@ Format based on [Keep a Changelog](http://keepachangelog.com/).
 
 ## [0.2.0] - 2020-10-09
 
+### Added
+
+- Enable extension for `.redcode` files by default
+
 ### Changed
 
 - Migrate to the `corewa-rs` VSCode publisher and Github organization

package.json

@@ -33,7 +33,8 @@
           "redcode"
         ],
         "extensions": [
-          ".red"
+          ".red",
+          ".redcode",
         ],
         "configuration": "./language-configuration.json"
       }