refactor: init cypress-cucumber-preprocessor install.

node_modules/core-js/modules/es6.string.fixed.js

@@ -0,0 +1,7 @@
+'use strict';
+// B.2.3.6 String.prototype.fixed()
+require('./_string-html')('fixed', function (createHTML) {
+  return function fixed() {
+    return createHTML(this, 'tt', '', '');
+  };
+});