Figure out how to proceed with Vue 2 compatibility

[rchl]

Follow discussion at #159 (comment) for more details.

[FichteFoll]

I tried out the vue-2-support branch and I am running into an issue, apparently because it requires upstream changes in the LSP package:

Unable to start subprocess for LSP-vue
Traceback (most recent call last):
  File "/home/fichte/.config/sublime-text/Installed Packages/LSP.sublime-package/plugin/core/windows.py", line 265, in start_async
    cwd = plugin_class.on_pre_start(self._window, initiating_view, workspace_folders, config)
  File "/home/fichte/.config/sublime-text/Packages/LSP-vue/plugin.py", line 61, in on_pre_start
    major_version = re.search('[0-9]+', json.get('dependencies', {}).get('vue', '')).group()
AttributeError: 'NoneType' object has no attribute 'group'

[rchl]

I think that code is not defensive enough. It calls group() on regex even if it didn't match).

Also that branch has some other issues: #159 (comment)