rpm: Add pytest as dependency
rpm: Add pytest as dependency

I thought this would be added automatically, based on [1]. Apparently
not.

[1] https://docs.fedoraproject.org/en-US/packaging-guidelines/Python/#_test_dependencies_2

Signed-off-by: Stephen Finucane <06fa905d7f2aaced6dc72e9511c71a2a51e8aead@that.guru>

getpatchwork/git-pw