chore(migrate): Add migration warning on install

Author: christopherthielen

migrate/migrate.json

@@ -0,0 +1,4 @@
+{
+  "old": "angular-ui-router",
+  "new": "@uirouter/angularjs"
+}

migrate/migratewarn.js

@@ -0,0 +1,12 @@
+#!env node
+"use strict";
+
+var pkg = require('../package.json');
+var migrate = require('./migrate.json');
+
+if (pkg.name === migrate.old) {
+  var warning = 'WARNING! this npm package "' + migrate.old + '" has been renamed to "' + migrate.new + '".  Please update your package.json';
+  var warning2 = 'See https://ui-router.github.io/blog/uirouter-scoped-packages/ for details.';
+  console.log("\x1b[1m\x1b[37m\x1b[41m%s\x1b[0m", warning);
+  console.log("\x1b[1m\x1b[37m\x1b[41m%s\x1b[0m", warning2);
+}

package.json

@@ -12,6 +12,7 @@
     "bundle_events": "rollup -c --environment EVENTS  && rollup -c --environment EVENTS,MINIFY",
     "bundle_resolve": "rollup -c --environment RESOLVE && rollup -c --environment RESOLVE,MINIFY",
     "prepare": "npm run package",
+    "install": "node migrate/migratewarn.js",
     "noimplicitany": "tsc --noEmit --noImplicitAny --moduleResolution node --target es6 test/noimplicitany.ts",
     "test": "npm run test:integrate",
     "test:ng12": "karma start --ngversion 1.2",