* rewrite tests to work with meson
This ports our tests to meson and makes them able to be run in parallel.
* add tests to ci
* rewrite test/check-trailing-newlines in bash
This test was using a GNU sed command which does not work on Alpine Linux.
The test environment previously used the system default paths instead of installing the necessary $PATH environment
variable to make finding eval_ecolors work.
This closes#117.
X-Gentoo-Bug: 374191.
X-Gentoo-Bug-URL: https://bugs.gentoo.org/show_bug.cgi?id=374191.
When the test suite is being run, we need our local directories in PATH
and LD_LIBRARY_PATH before the system directories. This makes sure we
run our tests using the currently built tree.
