chore(deps): update protobuf packages to v3.11.1

[renovate-bot]

This PR contains the following updates:

Package	Update	Change
com.google.protobuf:protobuf-java	patch	3.11.0 -> 3.11.1
com.google.protobuf:protobuf-java-util	patch	3.11.0 -> 3.11.1

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[codecov]

Codecov Report

Merging #28 into master will increase coverage by 0.07%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master      #28      +/-   ##
============================================
+ Coverage     71.22%   71.29%   +0.07%     
  Complexity      981      981              
============================================
  Files            62       62              
  Lines          5300     5310      +10     
  Branches        592      598       +6     
============================================
+ Hits           3775     3786      +11     
- Misses         1337     1338       +1     
+ Partials        188      186       -2

Impacted Files	Coverage Δ	Complexity Δ
...restore/collection/ImmutableSortedMapIterator.java	0% <0%> (ø)	0% <0%> (ø)	⬇️
...rc/main/java/com/google/cloud/firestore/Query.java	91.89% <0%> (+0.1%)	94% <0%> (ø)	⬇️
...rc/main/java/com/google/cloud/firestore/Watch.java	91.91% <0%> (+0.1%)	57% <0%> (ø)	⬇️
...a/com/google/cloud/firestore/FirestoreOptions.java	36.97% <0%> (+0.53%)	7% <0%> (ø)	⬇️
...oogle/cloud/firestore/v1/FirestoreAdminClient.java	59.84% <0%> (+1.57%)	38% <0%> (ø)	⬇️

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