deps: update dependency io.grpc:grpc-stub to v1.43.2 (#289)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [io.grpc:grpc-stub](https://togithub.com/grpc/grpc-java) | `1.43.1` -> `1.43.2` | [![age](https://badges.renovateapi.com/packages/maven/io.grpc:grpc-stub/1.43.2/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/io.grpc:grpc-stub/1.43.2/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/io.grpc:grpc-stub/1.43.2/compatibility-slim/1.43.1)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/io.grpc:grpc-stub/1.43.2/confidence-slim/1.43.1)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

<details>
<summary>grpc/grpc-java</summary>

### [`v1.43.2`](https://togithub.com/grpc/grpc-java/releases/v1.43.2)

##### Dependencies

-   Upgraded Protobuf to 3.19.2 to avoid CVE-2021-22569. See the [protobuf advisory](https://togithub.com/protocolbuffers/protobuf/security/advisories/GHSA-wrvw-hg22-4m67)

</details>

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grpc-google-common-protos/build.gradle

@@ -18,7 +18,7 @@ repositories {
 }
 
 dependencies {
-  compile 'io.grpc:grpc-stub:1.43.1'
+  compile 'io.grpc:grpc-stub:1.43.2'
   compile 'io.grpc:grpc-protobuf:1.43.2'
   compile project(':proto-google-common-protos')
 }