Fixed version in changelog, Fixed dependency for make in control, fixed ...

Changes in details:
1. debian/control:
We don't need to depend on make, but xpi should recommended make as it is script.
Bumped dh to 9.

2. debian/watch:
Added file to track upstream. Tested. It works!

3. debian/copyright:
Minor formatting according to copyright-format 1.0

4. Added debian/source/format since we're not native Debian package.

5. debian/changelog:
Fixed version.

I'm doing separate Pull request to fix Makefile in main branch.