deps: update dependency com.google.protobuf:protobuf-java to v3.21.0 (#370)

[![Mend Renovate](https://app.renovatebot.com/images/banner.svg)](https://renovatebot.com) This PR contains the following updates: | Package | Change | Age | Adoption | Passing | Confidence | |---|---|---|---|---|---| | [com.google.protobuf:protobuf-java](https://developers.google.com/protocol-buffers/) ([source](https://togithub.com/protocolbuffers/protobuf)) | `3.20.1` -> `3.21.0` | [![age](https://badges.renovateapi.com/packages/maven/com.google.protobuf:protobuf-java/3.21.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.protobuf:protobuf-java/3.21.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.protobuf:protobuf-java/3.21.0/compatibility-slim/3.20.1)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.protobuf:protobuf-java/3.21.0/confidence-slim/3.20.1)](https://docs.renovatebot.com/merge-confidence/) | --- ### Release Notes <details> <summary>protocolbuffers/protobuf</summary> ### [`v3.21.0`](https://togithub.com/protocolbuffers/protobuf/compare/v3.20.1...v3.21.0) </details> --- ### Configuration 📅 **Schedule**: At any time (no schedule defined). 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, click this checkbox. --- This PR has been generated by [Mend Renovate](https://www.mend.io/free-developer-tools/renovate/). View repository job log [here](https://app.renovatebot.com/dashboard#github/googleapis/java-common-protos).

Author: renovate-bot

proto-google-common-protos/build.gradle

@@ -18,7 +18,7 @@ repositories {
 }
 
 dependencies {
- compile 'com.google.protobuf:protobuf-java:3.20.1'
+ compile 'com.google.protobuf:protobuf-java:3.21.0'
 }
 
 sourceSets {