verify stability on updates

[goatherd]

Need to consider various composer update types:

• vcs (git)
• archive
  others?

Since the patch may be applied to a range of target versions it might break/ be broken by updates to the patched code.

It should be documented well and in detail that using patches is applicable to only fixed versions/ tags and not ranges. That way it may be ensured to have the proper patch tag applied for any target version. Relates to goatherd/phpcs_installer/issues/5.