fix: Switch converted to Object Literal (#940)

* updating a switch into object literal and fixed a couple linter errors

* added a comment about weird formatting

* style: use lodash get

* fix: pass eslint + puglint + jest

server/db/migrations/2.0.0-beta.148.js

@@ -1,3 +1,5 @@
+/* global WIKI */
+
 exports.up = knex => {
   const dbCompat = {
     blobLength: (WIKI.config.db.type === `mysql` || WIKI.config.db.type === `mariadb`)