chore: allow lower case subject

[jpedroschmitz]

This PR updates the config to support lower case subject.

With this change, the following commits are valid:

chore: Test
chore: test

Before, just the first commit was a valid one.

[pellizzetti]

This shouldn't've been merged, IMO. @diego3g

Any casing may be used, but it’s ALWAYS best to be consistent. @jpedroschmitz, as OSS lead you should just choose one and go with it.

Besides that, it really seems like a PITA to change renovate to do semantic commits starting with a capital letter, but it is possible.

---

rant

I never really understood why some conventions would choose to actively enforce lower case subject, anywhere else you fill in a subject you would use uppercase.

It seems that the reason behind that it's something along those lines:

A rule of thumb is that it should be written so to complete the sentence "This change modifies the project to _." That means it does not start with a capital letter, is not a complete sentence, and actually summarizes the result of the change.

But, honestly, this feels like such a stretch. For me, the sole fact that they feel the need to explain it, gives the impression that this specific rule does not make much sense at all.

/rant

[diego3g]

Agreed with you @pellizzetti. We just merged this because @jpedroschmitz said that this was blocking renovate itself, but i also think that we need to be consistent. I also agree with the lower case subject you mentioned above.