sysutils/pfetch: Update to 1.7.0

Changes since 1.6.0:

1.7.0

What's Changed

• Clean-up manual page by @polluks in #54
• Added PF_ENABLE_SLOW_PACKAGE_MANAGERS option, for now just re-enables pip package count, but in the future other slow package managers will be locked behind this option.
• Support cpus info for OpenBSD

This release was very small, I've been making new releases every month, but
eventually a month will happen with no new commits. I may switch to a 3 month
schedule if development slows down too much, but for now the policy is that if
a month goes by with no commits than the release is pushed back to the next
month.

Merry Christmas and happy holidays!

Full Changelog: https://github.com/Un1q32/pfetch/compare/1.6.0...1.7.0