Use 2.12.x wildcard version in CI

[xerial]

No description provided.

[codecov]

Codecov Report

Merging #2329 (4713f88) into master (7ba1b05) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2329   +/-   ##
=======================================
  Coverage   82.80%   82.80%           
=======================================
  Files         341      341           
  Lines       13081    13081           
  Branches      796      796           
=======================================
  Hits        10832    10832           
  Misses       2249     2249           

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