Hint pager about what it is displaying

By setting the PAGER_LABEL environment variable. Requires moor 2.8.0
or later.

This release also improves Java command line parsing with support for
(ignoring) argument files.

Parse dotnet command lines

Just like for other VMs, dotnet command lines will now get more useful
names than just "dotnet".

Build system modernization

Migrated to pyproject.toml.

PR at #138, cred to Vincent Branch for
the change.

Our favorite pager was renamed, it is now `moor`

Improve parsing of Java command lines

-Djdk.java.options= is now handled, making mvnd report as "Launcher".
Correct but not super helpful. An improvement on what was there before
though which was just wrong.

Also, improve parsing of `last` output to work on Raspbian.

Handle broken-pipe situations in px

This release comes with two changes:
- Handle broken-pipe situations in px
- Improve "node" command line parsing

Stop failing silently when `last` is missing

Fix a CI failure

Fix source wheel builds

In the previous release, building from source wheels got you the wrong
version number. That has now been fixed.

Fix build script

Building after cloning was sometimes failing in 3.6.6.