Update dependency jest to v23

Author: renovate-bot

package.json

@@ -31,7 +31,7 @@
     "eslint-plugin-unicorn": "4.0.3",
     "husky": "1.0.0-rc.8",
     "identity-obj-proxy": "3.0.0",
-    "jest": "22.4.3",
+    "jest": "23.0.1",
     "koa-connect": "2.0.1",
     "postcss-calc": "6.0.1",
     "postcss-color-function": "4.0.1",