Add *.tsbuildinfo to gitignore

[robertknight]

See hypothesis/h#8992

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.42%. Comparing base (48ff85c) to head (95b1a33).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6635   +/-   ##
=======================================
  Coverage   99.42%   99.42%           
=======================================
  Files         270      270           
  Lines       10174    10174           
  Branches     2419     2419           
=======================================
  Hits        10116    10116           
  Misses         58       58           

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