Add 'element' field name to list

grammar.js

@@ -169,7 +169,7 @@ module.exports = grammar({
 
     list_expression: ($) => seq(
       "[",
-      optional(commaSeparated($._expr)),
+      optional(commaSeparated(field("element", $._expr))),
       "]",
     ),
 

src/grammar.json

@@ -682,8 +682,12 @@
               "type": "SEQ",
               "members": [
                 {
-                  "type": "SYMBOL",
-                  "name": "_expr"
+                  "type": "FIELD",
+                  "name": "element",
+                  "content": {
+                    "type": "SYMBOL",
+                    "name": "_expr"
+                  }
                 },
                 {
                   "type": "REPEAT",
@@ -695,8 +699,12 @@
                         "value": ","
                       },
                       {
-                        "type": "SYMBOL",
-                        "name": "_expr"
+                        "type": "FIELD",
+                        "name": "element",
+                        "content": {
+                          "type": "SYMBOL",
+                          "name": "_expr"
+                        }
                       }
                     ]
                   }

src/node-types.json

@@ -158,44 +158,45 @@
   {
     "type": "list_expression",
     "named": true,
-    "fields": {},
-    "children": {
-      "multiple": true,
-      "required": false,
-      "types": [
-        {
-          "type": "boolean_literal",
-          "named": true
-        },
-        {
-          "type": "identifier",
-          "named": true
-        },
-        {
-          "type": "integer_literal",
-          "named": true
-        },
-        {
-          "type": "interpreted_string_literal",
-          "named": true
-        },
-        {
-          "type": "list_expression",
-          "named": true
-        },
-        {
-          "type": "map_expression",
-          "named": true
-        },
-        {
-          "type": "raw_string_literal",
-          "named": true
-        },
-        {
-          "type": "select_expression",
-          "named": true
-        }
-      ]
+    "fields": {
+      "element": {
+        "multiple": true,
+        "required": false,
+        "types": [
+          {
+            "type": "boolean_literal",
+            "named": true
+          },
+          {
+            "type": "identifier",
+            "named": true
+          },
+          {
+            "type": "integer_literal",
+            "named": true
+          },
+          {
+            "type": "interpreted_string_literal",
+            "named": true
+          },
+          {
+            "type": "list_expression",
+            "named": true
+          },
+          {
+            "type": "map_expression",
+            "named": true
+          },
+          {
+            "type": "raw_string_literal",
+            "named": true
+          },
+          {
+            "type": "select_expression",
+            "named": true
+          }
+        ]
+      }
     }
   },
   {