Copy 1.9 spec to 1.10

[scpeters]

🎉 New feature

Create new minor version of spec 1.10 for Garden, needed by several new features.

Summary

There are a few new features proposed for the spec in Garden, so let's bump the minor version.

Test it

Checklist

• Signed all commits for DCO
• Added tests
• Added example and/or tutorial
• Updated documentation (as needed)
• Updated migration guide (as needed)
• Consider updating Python bindings (if the library has them)
• codecheck passed (See contributing)
• All tests passed (See test coverage)
• While waiting for a review on your PR, please help review another open pull request to support the maintainers

Note to maintainers: Remember to use Squash-Merge and edit the commit message to match the pull request summary while retaining Signed-off-by messages.

[scpeters]

cmake warning fixed in #1074

[codecov]

Codecov Report

Merging #1073 (2ec5669) into main (51e19d7) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #1073   +/-   ##
=======================================
  Coverage   83.12%   83.12%           
=======================================
  Files         154      154           
  Lines       18702    18702           
=======================================
  Hits        15546    15546           
  Misses       3156     3156           

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[chapulina]

LGTM, follows the pattern from #568.

[chapulina]

While adding to the 1.10 spec, I noticed this change was missing:

• Set protocol version to 1.10 #1076