Add rule to check for past/present tense

[supremebeing7]

In my projects, I prefer all comment messages to be in future tense (i.e. they should be in this format: "This commit will #{commit_message}")

This could be complicated but this gem might be helpful: https://github.com/rossmeissl/verbs

[mmozuras]

@supremebeing7 sounds like a great idea! And that gem seems like a perfect way to do it (if its performance if acceptable) 👏