Fix COUNT(*)

Author: DerekStride

grammar.js

@@ -1008,7 +1008,7 @@ module.exports = grammar({
       '(',
       seq(
         optional($.keyword_distinct),
-        field('parameter', $._expression),
+        field('parameter', choice($._expression, $.all_fields)),
       ),
       ')',
     ),

src/grammar.json

@@ -4303,8 +4303,17 @@
               "type": "FIELD",
               "name": "parameter",
               "content": {
-                "type": "SYMBOL",
-                "name": "_expression"
+                "type": "CHOICE",
+                "members": [
+                  {
+                    "type": "SYMBOL",
+                    "name": "_expression"
+                  },
+                  {
+                    "type": "SYMBOL",
+                    "name": "all_fields"
+                  }
+                ]
               }
             }
           ]

src/node-types.json

@@ -1360,6 +1360,10 @@
         "multiple": false,
         "required": true,
         "types": [
+          {
+            "type": "all_fields",
+            "named": true
+          },
           {
             "type": "binary_expression",
             "named": true