add elixir support

Signed-off-by: matthiasgekiere <[email protected]>

Author: mattgek

src/language.mapper.js

@@ -31,8 +31,8 @@ const languageMappings = {
     plaintext: { ext: "txt", monaco: "plaintext" },
     txt: { ext: "txt", monaco: "plaintext" },
     dart: { ext: "dart", monaco: "dart" },
-    elixir: { ext: "ex", monaco: "plaintext" },
-    ex: { ext: "ex", monaco: "plaintext" },
+    elixir: { ext: "ex", monaco: "elixir" },
+    ex: { ext: "ex", monaco: "elixir" },
     jsp: { ext: "jsp", monaco: "jsp" },
     html: { ext: "html", monaco: "html" },
     css: { ext: "css", monaco: "css" },