added Play 2.7.0-RC3 (#233)

Author: octonato

conf/playReleases.json

@@ -5,20 +5,8 @@
     },
     "development": [
         {
-            "version": "2.7.0-M4",
-            "date": "Oct 12 2018"
-        },
-        {
-            "version": "2.7.0-M3",
-            "date": "Aug 27 2018"
-        },
-        {
-            "version": "2.7.0-M2",
-            "date": "Jul 20 2018"
-        },
-        {
-            "version": "2.7.0-M1",
-            "date": "Jun 22 2018"
+            "version": "2.7.0-RC3",
+            "date": "Nov 14 2018"
         }
     ],
     "previous": [