When I followed the example in the documentation, `describe-variable` reflected the updated value ("jj") but spacemacs ignored it and continued to use the default value ("fd").
`evil-escape.el` mentions:
```elisp
;; The key sequence can be customized with the variable
;; `evil-escape-key-sequence'
;; It must be set before requiring evil-escape.
```
So I tried moving the `setq` to `/init` instead of `/config`. That worked.
- move JavaScript/js2-mode into a contrib layer
- add js2-refactor
- change keybindings to be more spacemacsy
- add a function to define a command prefix for a specific mode
