Ensure valid key validation is enabled for all components

[philippjfr]

Turns out after all my hard work on enabling validation most components weren't actually validating the keys of the spec.

Fixes #487

[codecov-commenter]

Codecov Report

Merging #493 (af75dbf) into main (592e75b) will increase coverage by 0.04%.
Report is 1 commits behind head on main.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #493      +/-   ##
==========================================
+ Coverage   69.36%   69.41%   +0.04%     
==========================================
  Files          79       79              
  Lines        9128     9159      +31     
==========================================
+ Hits         6332     6358      +26     
- Misses       2796     2801       +5     

Files	Coverage Δ
lumen/base.py	84.63% <100.00%> (+0.09%)	⬆️
lumen/filters/base.py	71.33% <100.00%> (+0.09%)	⬆️
lumen/layout.py	79.13% <100.00%> (-0.38%)	⬇️
lumen/pipeline.py	64.61% <100.00%> (+0.09%)	⬆️
lumen/sources/base.py	62.74% <100.00%> (-0.11%)	⬇️
lumen/tests/test_dashboard.py	100.00% <ø> (ø)
lumen/tests/validation/test_filters.py	100.00% <100.00%> (ø)
lumen/tests/validation/test_layout.py	100.00% <100.00%> (ø)
lumen/tests/validation/test_pipeline.py	100.00% <100.00%> (ø)
lumen/tests/validation/test_sources.py	100.00% <100.00%> (ø)
... and 4 more

... and 1 file with indirect coverage changes

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[github-actions]

This pull request has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.