feat: `bigint` for the `DefinePlugin` plugin

.eslintrc.js

@@ -11,7 +11,7 @@ module.exports = {
 		es6: true
 	},
 	parserOptions: {
-		ecmaVersion: 2020
+		ecmaVersion: 2018
 	},
 	rules: {
 		"prettier/prettier": "error",

test/configCases/plugins/define-plugin-bigint/webpack.config.js

@@ -6,8 +6,8 @@ module.exports = {
 	},
 	plugins: [
 		new DefinePlugin({
-			BIGINT: 9007199254740991n,
-			ZERO_BIGINT: 0n
+			BIGINT: BigInt(9007199254740991),
+			ZERO_BIGINT: BigInt(0)
 		})
 	]
 };

test/configCases/plugins/define-plugin/webpack.config.js

@@ -12,8 +12,8 @@ module.exports = {
 			ONE: 1,
 			STRING: '"string"',
 			EMPTY_STRING: '""',
-			BIGINT: 9007199254740991n,
-			ZERO_BIGINT: 0n,
+			BIGINT: BigInt(9007199254740991),
+			ZERO_BIGINT: BigInt(0),
 			POSITIVE_ZERO: +0,
 			NEGATIVE_ZER0: -0,
 			NEGATIVE_NUMBER: -100.25,