Use acorn's builtin numeric separator support

Author: goto-bus-stop

README.md

@@ -35,7 +35,7 @@ The API is the same as [acorn](https://github.com/acornjs/acorn), but the follow
 
 And the following options have different defaults from acorn, to match Node modules:
 
- - `ecmaVersion: 2020`
+ - `ecmaVersion: 2021`
  - `allowHashBang: true`
  - `allowReturnOutsideFunction: true`
 

package.json

@@ -7,7 +7,7 @@
     "url": "https://github.com/browserify/acorn-node/issues"
   },
   "dependencies": {
-    "acorn": "^7.3.1",
+    "acorn": "^7.4.0",
     "acorn-walk": "^7.2.0",
     "setprototypeof": "^1.2.0",
     "xtend": "^4.0.2"
@@ -17,7 +17,6 @@
     "@babel/core": "^7.10.1",
     "@babel/preset-env": "^7.10.1",
     "acorn-class-fields": "^0.3.4",
-    "acorn-numeric-separator": "^0.3.2",
     "acorn-private-class-elements": "^0.2.5",
     "acorn-static-class-features": "^0.2.2",
     "mkdirp": "^0.5.5",
@@ -42,7 +41,6 @@
     "lint": "standard",
     "test": "node test",
     "prepare": "npm run build && node test",
-    "build:acorn-numeric-separator": "babel node_modules/acorn-numeric-separator --out-dir lib/acorn-numeric-separator",
     "build:acorn-class-fields": "babel node_modules/acorn-class-fields --out-dir lib/acorn-class-fields",
     "build:acorn-static-class-features": "babel node_modules/acorn-static-class-features --out-dir lib/acorn-static-class-features",
     "build:acorn-private-class-elements": "babel node_modules/acorn-private-class-elements --out-dir lib/acorn-private-class-elements",

src/index.js

@@ -4,14 +4,13 @@ var CJSParser = acorn.Parser
   // Required paths should be relative to the package root, because Babel outputs this file there.
   .extend(require('./lib/acorn-class-fields'))
   .extend(require('./lib/acorn-static-class-features'))
-  .extend(require('./lib/acorn-numeric-separator'))
   .extend(defaultOptionsPlugin)
 var ESModulesParser = CJSParser
 
 function mapOptions (opts) {
   if (!opts) opts = {}
   return {
-    ecmaVersion: 2020,
+    ecmaVersion: 2021,
     allowHashBang: true,
     allowReturnOutsideFunction: true,
     ...opts