Setting options for ALE in this file can sometimes overwrite settings that users set, say if they set global settings for ALE after ftplugin files are loaded. The Vue files should not be checked with ESLint by default, and ESLint checking should be enabled manually after installing the Vue ESLint plugin.
In #46, the question was where to put this option, and why some other
plugins put it in the 'after' directory. Vim-javascript puts it in the
'after' directory because they want to keep the settings in the ftplugin
shipped with Vim, and only add the 'suffixesadd' option. Since Vim
doesn't ship with a Vue plugin, we can safely put this option in ftplugin.
