chore(deps): update dependency com.google.cloud:libraries-bom to v12

[renovate-bot]

This PR contains the following updates:

Package	Update	Change
com.google.cloud:libraries-bom	major	11.0.0 -> 12.0.0

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[codecov]

Codecov Report

Merging #240 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #240   +/-   ##
=========================================
  Coverage     77.27%   77.27%           
  Complexity      142      142           
=========================================
  Files             6        6           
  Lines          1100     1100           
  Branches         18       18           
=========================================
  Hits            850      850           
  Misses          226      226           
  Partials         24       24           

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