Fix errors; Remove map keyword

bindings/dust

@@ -1 +1 @@
-Subproject commit 7fa5dd0f54e389052274affd8237040af545b938
+Subproject commit f30dfe64313e6d056241a18860f76653a8dd11e3

corpus/maps.txt

@@ -2,7 +2,7 @@
 Simple Map
 ==================
 
-map {
+{
     answer = 42
 }
 
@@ -22,7 +22,7 @@ map {
 Map Assignment
 ==================
 
-x = map {
+{
     answer = 42
 }
 
@@ -30,17 +30,13 @@ x = map {
 
 (root
   (item
-    (statement
-      (expression
-        (assignment
-          (identifier)          
     (statement
       (expression
         (value
           (map
             (identifier)
             (value
-                      (integer)))))))))))
+              (integer))))))))
 
 ==================
 Map Access

examples/variables.ds

@@ -1,13 +1,10 @@
-# Dust is data-oriented, so variables are declared with minimal syntax. A
+x = 1
-# single character, the assignment operator (`=`), sets a variable.
+y = "hello dust!"
-
+z = 42.0
-x = 1;
+list = (3, 2, x)
-y = "hello dust!";
+big_list = (x, y, z, list)
-z = 42.0;
+foo = {
-list = (3, 2, x);
+	x = "bar" 
-big_list = (x, y, z, list);
+	y = 42
-map.x = "foobar";
+	z = 0
-function = '
+}
-	message = "I am a function!";
-	output message;
-';

grammar.js

@@ -93,7 +93,6 @@ module.exports = grammar({
     ),
 
     map: $ => seq(
-      'map',
       '{',
       repeat(seq($.identifier, "=", $.value)),
       '}',

src/grammar.json

@@ -411,10 +411,6 @@
     "map": {
       "type": "SEQ",
       "members": [
-        {
-          "type": "STRING",
-          "value": "map"
-        },
         {
           "type": "STRING",
           "value": "{"

src/node-types.json

@@ -611,10 +611,6 @@
     "type": "loop",
     "named": false
   },
-  {
-    "type": "map",
-    "named": false
-  },
   {
     "type": "match",
     "named": false