Clean Up Build Environment

[shyamd]

I'm using this PR to clean up the build environment within the package.

• Run pre-commit lint on all files
• Make some tests a bit more robust
• Translate bash scripts into invoke tasks
• Setup dependencies to be managed by dependabot
• Get version from Git SCM tags <--- This causes problem with the validator action so I switched back and am just using tag parsing and invoke setver in the publish workflow

[codecov]

Codecov Report

Merging #301 into master will increase coverage by 0.44%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #301      +/-   ##
==========================================
+ Coverage   90.11%   90.56%   +0.44%     
==========================================
  Files          55       55              
  Lines        2287     2268      -19     
==========================================
- Hits         2061     2054       -7     
+ Misses        226      214      -12     

Flag	Coverage Δ
#unittests	90.56% <ø> (+0.44%)	⬆️

Impacted Files	Coverage Δ
optimade/server/main.py	85.71% <ø> (+7.74%)	⬆️
optimade/server/main_index.py	90.47% <ø> (+10.08%)	⬆️

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[CasperWA]

I forgot to mention that there's a new client dependency (from #297), namely jarvis.

[CasperWA]

Only minor change requests.

[CasperWA]

Thanks @shyamd !

Finally getting this through, after several iterations and rewrites. Thanks so much!