Adopt deadfoxygrandpa/Elm.tmLanguage by elm-community

The original author deadfoxygrandpa is currently unresponsive.
Therefore elm-community has cloned his great package to be able to adapt new grammar introduced in Elm 0.17.

repository/e.json

@@ -382,7 +382,7 @@
 		},
 		{
 			"name": "Elm Language Support",
-			"details": "https://github.com/deadfoxygrandpa/Elm.tmLanguage",
+			"details": "https://github.com/elm-community/Elm.tmLanguage",
 			"labels": ["language syntax"],
 			"previous_names": ["Elm Syntax Highlighting"],
 			"releases": [