chore(resolver): simplify local require

Module#createRequire is supported since Node@12.x.

lib/resolver/node-resolver.js

@@ -117,18 +117,5 @@ NodeResolver.prototype.normalizePkg = function(pkg) {
 // helpers ////////////////////
 
 function createScopedRequire(cwd) {
-
-  // shim createRequireFromPath for Node < 10.12
-  // shim createRequireFromPath for Node < 12.2.0
-  const createRequireFromPath = Module.createRequire || Module.createRequireFromPath || (filename => {
-    const mod = new Module(filename, null);
-
-    mod.filename = filename;
-    mod.paths = Module._nodeModulePaths(path.dirname(filename));
-    mod._compile('module.exports = require;', filename);
-
-    return mod.exports;
-  });
-
-  return createRequireFromPath(path.join(cwd, '__placeholder__.js'));
+  return Module.createRequire(path.join(cwd, '__placeholder__.js'));
 }