Prepare for 1.0.0 release

Author: colinodell

CHANGELOG.md

@@ -10,4 +10,4 @@ Updates should follow the [Keep a CHANGELOG](http://keepachangelog.com/) princip
 ### Added
  - Initial commit
 
-[unreleased]: https://github.com/thephpleague/commonmark/compare/1.0.0...HEAD
+[unreleased]: https://github.com/colinodell/json5/compare/1.0.0...HEAD

composer.json

@@ -48,7 +48,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "1.0-dev"
+            "dev-master": "2.0-dev"
         }
     },
     "config": {