Use vanilla npm shrinkwrap instead of uber/npm-shrinkwrap; fixes #18559

Ports #19604 to v3.

Special thanks to @kikinteractive, @azer, and @npm.

package.json

@@ -15,6 +15,7 @@
   "author": "Twitter, Inc.",
   "scripts": {
     "change-version": "node grunt/change-version.js",
+    "shrinkwrap": "npm shrinkwrap --dev && mv ./npm-shrinkwrap.json ./grunt/npm-shrinkwrap.json",
     "test": "grunt test"
   },
   "style": "dist/css/bootstrap.css",
@@ -55,7 +56,6 @@
     "grunt-saucelabs": "~8.6.2",
     "load-grunt-tasks": "~3.4.1",
     "markdown-it": "^6.0.0",
-    "npm-shrinkwrap": "^200.4.0",
     "shelljs": "^0.6.0",
     "time-grunt": "^1.3.0"
   },