Update cheerio requirement from ^0.20.0 to ^0.22.0

Updates the requirements on [cheerio](https://github.com/cheeriojs/cheerio) to permit the latest version.
- [Release notes](https://github.com/cheeriojs/cheerio/releases)
- [Changelog](https://github.com/cheeriojs/cheerio/blob/master/History.md)
- [Commits](https://github.com/cheeriojs/cheerio/commits/0.22.0)

Signed-off-by: dependabot[bot] <support@dependabot.com>

package.json

@@ -31,7 +31,7 @@
   },
   "devDependencies": {
     "chai": "^3.5.0",
-    "cheerio": "^0.20.0",
+    "cheerio": "^0.22.0",
     "eslint": "^1.10.3",
     "eslint-config-hexo": "^1.0.2",
     "hexo": "^3.0.0",