8.0.0 won't remove old expired patch any more

[troy351]

• In case I already has a patch module+1.0.0.patch
• module was updated to 1.0.1
• So I created a new patch via npx patch-package module
• There is a new patch module+1.0.1.patch
• The old patch module+1.0.0.patch should be deleted and it is not

[karlhorky]

I can confirm this behavior, since 8.0.0, the old, outdated patch files are left around after a package is upgraded to a new version

@ds300 any bandwidth for a bug fix on this one?