v2.1.4: fix typo in README

package.json

@@ -1,7 +1,7 @@
 {
   "name": "greenlock-koa",
   "homepage": "https://git.coolaj86.com/coolaj86/greenlock-koa.js",
-  "version": "2.1.3",
+  "version": "2.1.4",
   "description": "An Automated HTTPS ACME client (Let's Encrypt v2) for Koa",
   "main": "index.js",
   "scripts": {