build(deps-dev): bump dev dependencies

[lukashroch]

Bump dev dependencies altogether as there were some of the packages required simultaneous bump, which dependabot was failing on.

Edit: lint actions on node 10 were turned off in CI. Eslint & markdownlint don't support node10 anymore. And it's not really needed to do linting on whole matrix, it's just dev step so should in fact be enough to run just one time.

[codecov]

Codecov Report

Merging #1205 (dbbc6d6) into master (bfba1e7) will decrease coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1205      +/-   ##
==========================================
- Coverage   95.11%   95.10%   -0.02%     
==========================================
  Files         117      117              
  Lines        1126     1123       -3     
  Branches      129      128       -1     
==========================================
- Hits         1071     1068       -3     
  Misses         23       23              
  Partials       32       32              

Impacted Files	Coverage Δ
src/sequelize/data-type/data-type-service.ts	84.61% <0.00%> (-1.10%)	⬇️
...ons/belongs-to-many/belongs-to-many-association.ts	92.30% <0.00%> (-0.29%)	⬇️
src/validation/length.ts	100.00% <0.00%> (ø)

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[theoludwig]

LGTM!