Clear info on missing patches

[krzkaczor]

I was just dockerizing one of my projects and due to funny COPY syntax i copied my patches to root of the project instead to ./patches directory. Which resulted in silent fail to patch packages.

The console output was:

patch-package: Applying patches...

I assumed that i just successfully applied patches. When it really did nothing.

I propose one of two things:

1. Fail when no patches were found. This seems like kinda logical step to me — if there are no patches something is wrong.
2. Make console output more ovious like write: NO PACKAGES FOUND (but exit with 0).

I am willing to make a PR after agreeing on what's better.

[ds300]

Hi, thanks for the suggestions! I think 2 should definitely happen 👍

1 makes a lot of sense too, but I'm not convinced it should be the default behaviour because I think it has the potential to annoy people when they first install patch-package and play around with it. It would be a great cli option though! I'd be very happy to receive a PR to that effect :)