Remove travis and replace badge with GH actions

Update to checkout@v4

Remove reference to Postgres/MySQL (GH actions config was largely copied from sql_bridge)

Updates to fix dialyzer failing on otp 26+

Add github actions workflow

Remove ?else macro

Update changelog - remove rebar3 binary

Update rebar.lock

Rework the filenames because hex doesn't like them

Update rebar.config wiht some hex stuff

Add some tag rules to makefile

Make qdate's version in app.src track the git tags

Produce a better error message if qdate hasn't been started

Update copyright date comment in qdate.erl

Increment version