deps: update autovalue.version to v1.7.2

[renovate-bot]

This PR contains the following updates:

Package	Update	Change
com.google.auto.value:auto-value-annotations	patch	1.7.1 -> 1.7.2
com.google.auto.value:auto-value	patch	1.7.1 -> 1.7.2

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[codecov]

Codecov Report

Merging #306 into master will increase coverage by 0.35%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master     #306      +/-   ##
============================================
+ Coverage     79.54%   79.89%   +0.35%     
  Complexity      992      992              
============================================
  Files            99       99              
  Lines          6447     6447              
  Branches        338      340       +2     
============================================
+ Hits           5128     5151      +23     
  Misses         1118     1118              
+ Partials        201      178      -23     

Impacted Files	Coverage Δ	Complexity Δ
...om/google/cloud/bigtable/emulator/v2/Emulator.java	58.26% <0.00%> (+0.86%)	14.00% <0.00%> (ø%)
...able/admin/v2/BaseBigtableInstanceAdminClient.java	61.46% <0.00%> (+4.39%)	56.00% <0.00%> (ø%)
...igtable/admin/v2/BaseBigtableTableAdminClient.java	62.90% <0.00%> (+4.72%)	67.00% <0.00%> (ø%)

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