Update license to Apache-2.0

Author: nguyenbs

composer.json

@@ -4,7 +4,7 @@
     "keywords": ["yii2", "OAuth", "fproject", "authenticate"],
     "homepage": "https://github.com/fproject/yii2-common",
     "type": "yii2-extension",
-    "license": "Apache License 2.0",
+    "license": "Apache-2.0",
     "support" : {
       "issues" : "https://github.com/fproject/yii2-common/issues"
     },