deps: update dependency com.google.errorprone:error_prone_core to v2.19.1 (#1069)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.errorprone:error_prone_core](https://errorprone.info) ([source](https://togithub.com/google/error-prone)) | `2.18.0` -> `2.19.1` | [![age](https://badges.renovateapi.com/packages/maven/com.google.errorprone:error_prone_core/2.19.1/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.errorprone:error_prone_core/2.19.1/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.errorprone:error_prone_core/2.19.1/compatibility-slim/2.18.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.errorprone:error_prone_core/2.19.1/confidence-slim/2.18.0)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

<details>
<summary>google/error-prone</summary>

### [`v2.19.1`](https://togithub.com/google/error-prone/releases/tag/v2.19.1): Error Prone 2.19.1

This release fixes a binary compatibility issue when running on JDK 11, see [#&#8203;3895](https://togithub.com/google/error-prone/issues/3895)

**Full Changelog**: https://togithub.com/google/error-prone/compare/v2.19.0...v2.19.1

### [`v2.19.0`](https://togithub.com/google/error-prone/releases/tag/v2.19.0): Error Prone 2.19.0

New Checkers:

-   [`NotJavadoc`](https://errorprone.info/bugpattern/NotJavadoc)
-   [`StringCaseLocaleUsage`](https://errorprone.info/bugpattern/StringCaseLocaleUsage)
-   [`UnnecessaryTestMethodPrefix`](https://errorprone.info/bugpattern/UnnecessaryTestMethodPrefix)

Fixes issues:  [#&#8203;956](https://togithub.com/google/error-prone/issues/956), [#&#8203;3504](https://togithub.com/google/error-prone/issues/3504), [#&#8203;3654](https://togithub.com/google/error-prone/issues/3654), [#&#8203;3703](https://togithub.com/google/error-prone/issues/3703), [#&#8203;3731](https://togithub.com/google/error-prone/issues/3731), [#&#8203;3737](https://togithub.com/google/error-prone/issues/3737), [#&#8203;3760](https://togithub.com/google/error-prone/issues/3760), [#&#8203;3779](https://togithub.com/google/error-prone/issues/3779), [#&#8203;3796](https://togithub.com/google/error-prone/issues/3796), [#&#8203;3809](https://togithub.com/google/error-prone/issues/3809), [#&#8203;3813](https://togithub.com/google/error-prone/issues/3813)

**Full Changelog**: https://togithub.com/google/error-prone/compare/v2.18.0...v2.19.0

</details>

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Author: renovate-bot

README.md

@@ -57,13 +57,13 @@ implementation 'com.google.cloud:google-cloud-datastore'
 If you are using Gradle without BOM, add this to your dependencies:
 
 ```Groovy
-implementation 'com.google.cloud:google-cloud-datastore:2.14.5'
+implementation 'com.google.cloud:google-cloud-datastore:2.14.6'
 ```
 
 If you are using SBT, add this to your dependencies:
 
 ```Scala
-libraryDependencies += "com.google.cloud" % "google-cloud-datastore" % "2.14.5"
+libraryDependencies += "com.google.cloud" % "google-cloud-datastore" % "2.14.6"
 ```
 <!-- {x-version-update-end} -->
 
@@ -370,7 +370,7 @@ Java is a registered trademark of Oracle and/or its affiliates.
 [kokoro-badge-link-5]: http://storage.googleapis.com/cloud-devrel-public/java/badges/java-datastore/java11.html
 [stability-image]: https://img.shields.io/badge/stability-stable-green
 [maven-version-image]: https://img.shields.io/maven-central/v/com.google.cloud/google-cloud-datastore.svg
-[maven-version-link]: https://central.sonatype.com/artifact/com.google.cloud/google-cloud-datastore/2.14.5
+[maven-version-link]: https://central.sonatype.com/artifact/com.google.cloud/google-cloud-datastore/2.14.6
 [authentication]: https://github.com/googleapis/google-cloud-java#authentication
 [auth-scopes]: https://developers.google.com/identity/protocols/oauth2/scopes
 [predefined-iam-roles]: https://cloud.google.com/iam/docs/understanding-roles#predefined_roles

pom.xml

@@ -143,7 +143,7 @@
     <github.global.server>github</github.global.server>
     <site.installationModule>google-cloud-datastore-parent</site.installationModule>
     <project.javadoc.protobufBaseURL>https://googleapis.dev/java/google-api-grpc/latest</project.javadoc.protobufBaseURL>
-    <error-prone.version>2.18.0</error-prone.version>
+    <error-prone.version>2.19.1</error-prone.version>
   </properties>
 
   <dependencyManagement>