Fix glob for npm format script on Windows (#18)

Author: Methuselah96

package.json

@@ -33,7 +33,7 @@
     "lint": "run-s lint:*",
     "lint:ts": "tslint \"__tests__/**/*.ts\"",
     "lint:js": "eslint \"{__tests__,src,pages/src,pages/lib}/**/*.js\"",
-    "format": "prettier --single-quote --trailing-comma=es5 --write \"{__tests__,src,pages/src,pages/lib,perf,resources}/**/*{\\.js,\\.ts}\"",
+    "format": "prettier --single-quote --trailing-comma=es5 --write \"{__tests__,src,pages/src,pages/lib,perf,resources}/**/*{.js,.ts}\"",
     "testonly": "./resources/jest.sh",
     "test": "run-s format build lint testonly test:types:*",
     "test:travis": "npm run test && ./resources/check-changes",