fix(examples): make examples webpack-dev-server npm script work on Windows (#2112)

* fix(examples): make dev server examples npm script work on windows

* fix(package): remove cross env

Author: knagaitsev

examples/run-example.js

@@ -0,0 +1,9 @@
+'use strict';
+
+const { spawn } = require('child_process');
+
+const cwd = process.env.INIT_CWD;
+spawn('node', ['../../../bin/webpack-dev-server.js'], {
+  cwd,
+  stdio: 'inherit',
+});

package.json

@@ -31,7 +31,7 @@
     "build:client:live": "webpack ./client-src/live/index.js -o client/live.bundle.js --color --config client-src/live/webpack.config.js",
     "build:client:sockjs": "webpack ./client-src/sockjs/index.js -o client/sockjs.bundle.js --color --config client-src/sockjs/webpack.config.js",
     "build:client": "rimraf ./client/* && npm-run-all -s -l -p \"build:client:**\"",
-    "webpack-dev-server": "cd $INIT_CWD && node ../../../bin/webpack-dev-server.js",
+    "webpack-dev-server": "node examples/run-example.js",
     "release": "standard-version"
   },
   "dependencies": {