Fix.

node_modules/is-generator-fn/index.js

@@ -1,14 +0,0 @@
-'use strict';
-const {toString} = Object.prototype;
-
-module.exports = value => {
-	if (typeof value !== 'function') {
-		return false;
-	}
-
-	return (value.constructor && value.constructor.name === 'GeneratorFunction') ||
-		toString.call(value) === '[object GeneratorFunction]';
-};
-
-// TODO: Remove this for the next major release
-module.exports.default = module.exports;