Adapt lint configuration

Author: adrianheine

.eslintignore

@@ -0,0 +1 @@
+dist/

.eslintrc.json

@@ -3,6 +3,10 @@
         "es6": true,
         "node": true
     },
+    "overrides": [{
+      "files": ["rollup.config.js", "src/*"],
+      "parserOptions": { "sourceType": "module" }
+    }],
     "extends": ["eslint:recommended", "plugin:node/recommended"],
     "plugins": ["node"],
     "rules": {

rollup.config.js

@@ -1,3 +1,4 @@
+// eslint-disable-next-line node/no-unsupported-features/es-syntax
 export default {
   input: "src/index.js",
   output: [

src/index.js

@@ -142,6 +142,7 @@ function withAcornBigInt(acorn, Parser) {
   }
 }
 
+// eslint-disable-next-line node/no-unsupported-features/es-syntax
 export default function numericSeparator(Parser) {
   const acorn = Parser.acorn || require("acorn")
   const withAcornBigIntSupport = (acorn.version.startsWith("6.") && !(acorn.version.startsWith("6.0.") || acorn.version.startsWith("6.1."))) || acorn.version.startsWith("7.")