This is a very simple plugin that binds Ctrl+h to navigating up a directory. This makes it very easy
to go up a few directories without having to type any commands.
I haven't tested this on a wide varieties of prompts and so the prompt refreshing in place may not work for every setup. If it doesn't work for you, open an issue and I can try to fix it. I'm also open to PRs that fix particular setups.
I didn't come up with the perl program this code uses. I found it online somewhere a long time ago. Thank you internet.