Update tree-sitter-compiler, use new grammar API

grammar.coffee

@@ -1,16 +1,13 @@
-module.exports =
-({choice, err, repeat, seq, sym, token, optional, prec}) ->
-
-  commaSep1 = (rule) ->
+commaSep1 = (rule) ->
   seq(rule, repeat(seq(",", rule)))
 
-  commaSep = (rule) ->
+commaSep = (rule) ->
   optional(commaSep1(rule))
 
-  terminator = ->
+terminator = ->
   choice(";", sym("_line_break"))
 
-  PREC =
+PREC =
   COMMA: -1,
   ASSIGN: 0,
   BLOCK: 1,
@@ -28,7 +25,7 @@ module.exports =
   CALL: 12,
   MEMBER: 13
 
-  {
+module.exports = grammar
   name: 'javascript'
 
   ubiquitous: -> [
@@ -344,4 +341,3 @@ module.exports =
       choice(@identifier, @string),
       ":",
       @_expression)
-  }

package.json

@@ -14,7 +14,7 @@
     "nan": "1.7.x"
   },
   "devDependencies": {
-    "tree-sitter-compiler": ">= 0.0.20"
+    "tree-sitter-compiler": ">= 0.0.21"
   },
   "scripts": {
     "prepublish": "tree-sitter compile",