Default to the vimrc linter setting if availble (#118)

* Default to the vimrc linter setting if availble

* Use the default value for aliases too

Author: w0rp

ftplugin/vue.vim

@@ -20,5 +20,5 @@ endif
 
 " Run only ESLint for Vue files by default.
 " linters specifically for Vue can still be loaded.
-let b:ale_linter_aliases = ['vue', 'javascript']
-let b:ale_linters = ['eslint']
+let b:ale_linter_aliases = get(get(g:, 'ale_linter_aliases', {}), 'vue', ['vue', 'javascript'])
+let b:ale_linters = get(get(g:, 'ale_linters', {}), 'vue', ['eslint', 'vls'])