Create codeql-analysis.yml

[tony]

tmuxp: tmux-python/tmuxp#742

[codecov]

Codecov Report

Merging #356 (9cba15d) into master (8038abd) will not change coverage.
The diff coverage is n/a.

❗ Current head 9cba15d differs from pull request most recent head 008e413. Consider uploading reports for the commit 008e413 to get more accurate results

@@           Coverage Diff           @@
##           master     #356   +/-   ##
=======================================
  Coverage   87.80%   87.80%           
=======================================
  Files          15       15           
  Lines        1500     1500           
=======================================
  Hits         1317     1317           
  Misses        183      183           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 8038abd...008e413. Read the comment docs.