fix: Misplaced dev dependency

Author: fernandopasik

package.json

@@ -34,13 +34,13 @@
     "camelize": "^1.0.0",
     "except": "^0.1.3",
     "front-matter": "^2.1.2",
-    "jest": "^20.0.0",
     "node-prismjs": "^0.1.0",
     "remarkable": "^1.7.1"
   },
   "devDependencies": {
     "eslint": "^3.19.0",
     "eslint-config-fernandopasik": "^0.5.1",
+    "jest": "^20.0.0",
     "watch": "^1.0.2"
   },
   "engines": {