No option to re-install a package

[jtudelag]

Currently microdnf does not implement any option to reinstall a package. So let's say someone removes a file installed by a given package.

The only option to re-install it, would be to remove it with rpm and run a microdnf install again.
IMHO adding "reinstall" or "install --force" would be a good approach.

[esamattis]

For anyone coming from google the rpm remove goes like this

rpm --erase --nodeps tzdata && microdnf install tzdata

I had to do this to fix broken tzdata package on the ubi8 minimal image.

[jrohel]

OK. I started work on the reinstall command. PR #61

[jrohel]

Command reinstall implemented in #61