nvitop v1.5.0

What's Changed

• deps(python): drop Python 3.7 support by @XuehaiPan in #150
• feat(tui): show %GMBW in main screen by @XuehaiPan in #156
• chore(callbacks): deprecate nvitop.callbacks as officially unmaintained by @XuehaiPan in #157
• fix(tui/host): ignore errors when collecting host metrics by @XuehaiPan in #163
• lint(tui): add doctests and add type annotations in nvitop.tui by @XuehaiPan in #164

Full Changelog: v1.4.2...v1.5.0