chore: remove node 10 job

[VerteDinde]

• I have read the contribution documentation for this project.
• I agree to follow the code of conduct that this project follows, as appropriate.
• The changes are appropriately documented (if applicable).
• The changes have sufficient test coverage (if applicable).
• The testsuite passes successfully on my local machine (if applicable).

Summarize your changes:

CI is failing on Node 10 because multiple packages no longer support it (fs-extra, get, etc).
This PR eliminates that job so we can do a stable release. After which, we'll move to Node 14 as a minimum version number.

[codecov]

Codecov Report

Merging #1403 (750aaab) into main (7c01d6f) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #1403   +/-   ##
=======================================
  Coverage   95.61%   95.61%           
=======================================
  Files          15       15           
  Lines         776      776           
=======================================
  Hits          742      742           
  Misses         34       34           

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