deps: update opencensus.version to v0.31.0 (#1661)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [io.opencensus:opencensus-contrib-grpc-metrics](https://togithub.com/census-instrumentation/opencensus-java) | `0.30.0` -> `0.31.0` | [![age](https://badges.renovateapi.com/packages/maven/io.opencensus:opencensus-contrib-grpc-metrics/0.31.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/io.opencensus:opencensus-contrib-grpc-metrics/0.31.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/io.opencensus:opencensus-contrib-grpc-metrics/0.31.0/compatibility-slim/0.30.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/io.opencensus:opencensus-contrib-grpc-metrics/0.31.0/confidence-slim/0.30.0)](https://docs.renovatebot.com/merge-confidence/) |
| [io.opencensus:opencensus-exporter-stats-stackdriver](https://togithub.com/census-instrumentation/opencensus-java) | `0.30.0` -> `0.31.0` | [![age](https://badges.renovateapi.com/packages/maven/io.opencensus:opencensus-exporter-stats-stackdriver/0.31.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/io.opencensus:opencensus-exporter-stats-stackdriver/0.31.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/io.opencensus:opencensus-exporter-stats-stackdriver/0.31.0/compatibility-slim/0.30.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/io.opencensus:opencensus-exporter-stats-stackdriver/0.31.0/confidence-slim/0.30.0)](https://docs.renovatebot.com/merge-confidence/) |
| [io.opencensus:opencensus-exporter-trace-stackdriver](https://togithub.com/census-instrumentation/opencensus-java) | `0.30.0` -> `0.31.0` | [![age](https://badges.renovateapi.com/packages/maven/io.opencensus:opencensus-exporter-trace-stackdriver/0.31.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/io.opencensus:opencensus-exporter-trace-stackdriver/0.31.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/io.opencensus:opencensus-exporter-trace-stackdriver/0.31.0/compatibility-slim/0.30.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/io.opencensus:opencensus-exporter-trace-stackdriver/0.31.0/confidence-slim/0.30.0)](https://docs.renovatebot.com/merge-confidence/) |
| [io.opencensus:opencensus-contrib-zpages](https://togithub.com/census-instrumentation/opencensus-java) | `0.30.0` -> `0.31.0` | [![age](https://badges.renovateapi.com/packages/maven/io.opencensus:opencensus-contrib-zpages/0.31.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/io.opencensus:opencensus-contrib-zpages/0.31.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/io.opencensus:opencensus-contrib-zpages/0.31.0/compatibility-slim/0.30.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/io.opencensus:opencensus-contrib-zpages/0.31.0/confidence-slim/0.30.0)](https://docs.renovatebot.com/merge-confidence/) |
| [io.opencensus:opencensus-impl](https://togithub.com/census-instrumentation/opencensus-java) | `0.30.0` -> `0.31.0` | [![age](https://badges.renovateapi.com/packages/maven/io.opencensus:opencensus-impl/0.31.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/io.opencensus:opencensus-impl/0.31.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/io.opencensus:opencensus-impl/0.31.0/compatibility-slim/0.30.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/io.opencensus:opencensus-impl/0.31.0/confidence-slim/0.30.0)](https://docs.renovatebot.com/merge-confidence/) |
| [io.opencensus:opencensus-api](https://togithub.com/census-instrumentation/opencensus-java) | `0.30.0` -> `0.31.0` | [![age](https://badges.renovateapi.com/packages/maven/io.opencensus:opencensus-api/0.31.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/io.opencensus:opencensus-api/0.31.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/io.opencensus:opencensus-api/0.31.0/compatibility-slim/0.30.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/io.opencensus:opencensus-api/0.31.0/confidence-slim/0.30.0)](https://docs.renovatebot.com/merge-confidence/) |
| [io.opencensus:opencensus-contrib-grpc-util](https://togithub.com/census-instrumentation/opencensus-java) | `0.30.0` -> `0.31.0` | [![age](https://badges.renovateapi.com/packages/maven/io.opencensus:opencensus-contrib-grpc-util/0.31.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/io.opencensus:opencensus-contrib-grpc-util/0.31.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/io.opencensus:opencensus-contrib-grpc-util/0.31.0/compatibility-slim/0.30.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/io.opencensus:opencensus-contrib-grpc-util/0.31.0/confidence-slim/0.30.0)](https://docs.renovatebot.com/merge-confidence/) |

---

### Release Notes

<details>
<summary>census-instrumentation/opencensus-java</summary>

### [`v0.31.0`](https://togithub.com/census-instrumentation/opencensus-java/releases/v0.31.0)

[Compare Source](https://togithub.com/census-instrumentation/opencensus-java/compare/v0.30.0...v0.31.0)

-   fix: Shutdown Stackdriver MetricServiceClient properly by [@&#8203;janhicken](https://togithub.com/janhicken) in [census-instrumentation/opencensus-java#2091
-   implement gRPC client retry stats measures and views by [@&#8203;mackenziestarr](https://togithub.com/mackenziestarr) in [census-instrumentation/opencensus-java#2084

**Full Changelog**: census-instrumentation/opencensus-java@v0.29.0...v0.31.0

</details>

---

### Configuration

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---

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---

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google-cloud-spanner/pom.xml

@@ -15,7 +15,7 @@
   </parent>
   <properties>
     <site.installationModule>google-cloud-spanner</site.installationModule>
-    <opencensus.version>0.30.0</opencensus.version>
+    <opencensus.version>0.31.0</opencensus.version>
   </properties>
 
 

samples/install-without-bom/pom.xml

@@ -21,7 +21,7 @@
     <maven.compiler.target>1.8</maven.compiler.target>
     <maven.compiler.source>1.8</maven.compiler.source>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <opencensus.version>0.30.0</opencensus.version>
+    <opencensus.version>0.31.0</opencensus.version>
     <trace.version>2.1.1</trace.version>
     <cloudmonitoring.version>3.2.1</cloudmonitoring.version>
   </properties>

samples/snapshot/pom.xml

@@ -21,7 +21,7 @@
     <maven.compiler.target>1.8</maven.compiler.target>
     <maven.compiler.source>1.8</maven.compiler.source>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <opencensus.version>0.30.0</opencensus.version>
+    <opencensus.version>0.31.0</opencensus.version>
     <trace.version>2.1.1</trace.version>
     <cloudmonitoring.version>3.2.1</cloudmonitoring.version>
   </properties>

samples/snippets/pom.xml

@@ -23,7 +23,7 @@
     <maven.compiler.target>1.8</maven.compiler.target>
     <maven.compiler.source>1.8</maven.compiler.source>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <opencensus.version>0.30.0</opencensus.version>
+    <opencensus.version>0.31.0</opencensus.version>
   </properties>