Introduce tolerance for version upgrades in config file

[blimmer]

We just upgraded from Rails 5.0.6 to the newly released 5.0.7 and suddenly all of our existing safelisted entries started failing. After taking a look at it, we saw that the version incremented in the deprecation callstack message. Here's the diff that fixed the problem:

-    not deprecated: http://api.rubyonrails.org/v5.0.6/classes/ActionController/Parameters.html'
+    not deprecated: http://api.rubyonrails.org/v5.0.7/classes/ActionController/Parameters.html'

What do you think about adding some kind of tolerance for that version number to make bugfix upgrades easier?

I'd be willing to make a PR for something like this if it aligns with you!

[domcleal]

Sorry for the delay - this sounds like a good idea, I'd be happy to accept such a feature!

I did add support for matching prefixes only for a similar reason, if I remember correctly. It meant I could leave out some of the overly specific URLs etc. from messages if needed, this might be a useful workaround for you too.