Downgrade open from 7.0.0 to 6.4.0 (#8364)

Author: vince1995

packages/react-dev-utils/openBrowser.js

@@ -104,7 +104,7 @@ function startBrowserProcess(browser, url, args) {
   // Fallback to open
   // (It will always open new tab)
   try {
-    var options = { app: browser, wait: false, url: true };
+    var options = { app: browser, wait: false };
     open(url, options).catch(() => {}); // Prevent `unhandledRejection` error.
     return true;
   } catch (err) {

packages/react-dev-utils/package.json

@@ -67,7 +67,7 @@
     "inquirer": "7.0.3",
     "is-root": "2.1.0",
     "loader-utils": "1.2.3",
-    "open": "^7.0.0",
+    "open": "^6.4.0",
     "pkg-up": "3.1.0",
     "react-error-overlay": "^6.0.4",
     "recursive-readdir": "2.2.2",