chore(deps): update dependency com.google.cloud:libraries-bom to v8

[renovate-bot]

This PR contains the following updates:

Package	Update	Change
com.google.cloud:libraries-bom	major	7.0.1 -> 8.1.0

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[codecov]

Codecov Report

Merging #129 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #129   +/-   ##
=========================================
  Coverage     68.05%   68.05%           
  Complexity       35       35           
=========================================
  Files             2        2           
  Lines           144      144           
  Branches         15       15           
=========================================
  Hits             98       98           
  Misses           33       33           
  Partials         13       13           

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