Register elm-mode as a major mode for elm

Add sources for tree-sitter-elm as well as registering it for elm-mode

Author: theothornhill

tree-sitter-langs-build.el

@@ -85,6 +85,7 @@ If VERSION and OS are not specified, use the defaults of
     (c-sharp    "075a1b2")
     (cpp        "5e7476b")
     (css        "23f2cb9")
+    (elm        nil nil "https://github.com/razzeee/tree-sitter-elm")
     (fluent     "858fdd6")
     (go         "f5cae4e")
     (html       "92c17db")

tree-sitter-langs.el

@@ -83,6 +83,7 @@ See `tree-sitter-langs-repos'."
                 (c-mode          . c)
                 (c++-mode        . cpp)
                 (css-mode        . css)
+                (elm-mode        . elm)
                 (go-mode         . go)
                 (haskell-mode    . haskell)
                 (html-mode       . html)