deps: update dependency com.google.protobuf:protobuf-java to v3.12.0 (#141)

This PR contains the following updates: | Package | Update | Change | |---|---|---| | com.google.protobuf:protobuf-java | minor | `3.11.4` -> `3.12.0` | --- ### Renovate configuration :date: **Schedule**: At any time (no schedule defined). :vertical_traffic_light: **Automerge**: Disabled by config. Please merge this manually once you are satisfied. :recycle: **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox. :no_bell: **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box --- This PR has been generated by [WhiteSource Renovate](https://renovate.whitesourcesoftware.com). View repository job log [here](https://app.renovatebot.com/dashboard#googleapis/java-errorreporting).

Author: renovate-bot

pom.xml

@@ -68,7 +68,7 @@
  <google.common-protos.version>1.18.0</google.common-protos.version>
  <gax.version>1.56.0</gax.version>
  <grpc.version>1.29.0</grpc.version>
- <protobuf.version>3.11.4</protobuf.version>
+ <protobuf.version>3.12.0</protobuf.version>
  <junit.version>4.13</junit.version>
  <guava.version>29.0-android</guava.version>
  <threeten.version>1.4.4</threeten.version>