upgrade node-environment-flags (support for --port)

Author: boneskull

lib/cli/options.js

@@ -261,7 +261,7 @@ module.exports.loadPkgRc = loadPkgRc;
 const loadOptions = (argv = []) => {
   // save node-specific args having
   const nodeArgOptionalValues = new Map(
-    argv
+    (Array.isArray(argv) ? argv : argv.split(' '))
       .filter(arg => arg.includes('='))
       .map(arg => arg.substring(2).split('='))
   );