Improvement/cscli: add versioning for local parsers/post-overflows/etc.

[Lamera]

Is your feature request related to a problem? Please describe.
At this time our custom whitelist config is not versioned. This can be an issue when you have multiple instances and you made changes to this config. Then you never can be sure, which version this file is. I tried to add a version number in the config file, but then crowdsec doesn't start anymore.

Describe the solution you'd like
In cscli hub list local files should also have a version number. The configuration file, for example my_whitelist.yaml should have an option to define a version number in the yaml file.

Example of what you imagine

name: me/whitelists
description: "Whitelist events from private ipv4 addresses"
version: 1.2
whitelist:
  reason: "private ipv4 ranges"
  ip:
    - "127.0.0.1"

[sabban]

In the near future it will be possible to achieve this by using an alternate hub.