deps: update dependency com.google.api:gax-bom to v2.18.3 (#860)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.api:gax-bom](https://togithub.com/googleapis/gax-java) | `2.18.2` -> `2.18.3` | [![age](https://badges.renovateapi.com/packages/maven/com.google.api:gax-bom/2.18.3/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.api:gax-bom/2.18.3/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.api:gax-bom/2.18.3/compatibility-slim/2.18.2)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.api:gax-bom/2.18.3/confidence-slim/2.18.2)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

<details>
<summary>googleapis/gax-java</summary>

### [`v2.18.3`](https://togithub.com/googleapis/gax-java/blob/HEAD/CHANGELOG.md#&#8203;2183-httpsgithubcomgoogleapisgax-javacomparev2182v2183-2022-06-27)

[Compare Source](https://togithub.com/googleapis/gax-java/compare/v2.18.2...v2.18.3)

##### Bug Fixes

-   **deps:** update dependency com.google.api.grpc:grpc-google-common-protos to v2.9.0 ([#&#8203;1706](https://togithub.com/googleapis/gax-java/issues/1706)) ([eb195c0](https://togithub.com/googleapis/gax-java/commit/eb195c000b19472fc15a2586320f4421b6ee92a3))
-   **deps:** update dependency com.google.api.grpc:proto-google-common-protos to v2.9.0 ([#&#8203;1708](https://togithub.com/googleapis/gax-java/issues/1708)) ([0a606f5](https://togithub.com/googleapis/gax-java/commit/0a606f5d6f40a44b153f186d824e3a731586bb49))
-   **deps:** update dependency com.google.cloud:google-cloud-shared-config to v1.5.0 ([#&#8203;1711](https://togithub.com/googleapis/gax-java/issues/1711)) ([eb11bb0](https://togithub.com/googleapis/gax-java/commit/eb11bb027cde3e4abc8049a04056907de79386ab))
-   **deps:** update dependency com.google.protobuf:protobuf-bom to v3.21.2 ([#&#8203;1720](https://togithub.com/googleapis/gax-java/issues/1720)) ([19a38cf](https://togithub.com/googleapis/gax-java/commit/19a38cffd13fbaa547a9992f61689d70239b6ee4))
-   **deps:** update dependency org.mockito:mockito-core to v4.6.1 ([#&#8203;1705](https://togithub.com/googleapis/gax-java/issues/1705)) ([7befaa4](https://togithub.com/googleapis/gax-java/commit/7befaa4a2525f9b09091225b2f74a3e2fbfa3175))
-   **deps:** update dependency org.threeten:threetenbp to v1.6.0 ([#&#8203;1709](https://togithub.com/googleapis/gax-java/issues/1709)) ([42cdcaa](https://togithub.com/googleapis/gax-java/commit/42cdcaa5a5d2362e86f94a13870f3c9c48f8b7f7))

</details>

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Author: renovate-bot

java-core/pom.xml

@@ -151,7 +151,7 @@
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
     <github.global.server>github</github.global.server>
     <site.installationModule>google-cloud-core-parent</site.installationModule>
-    <gax.version>2.18.2</gax.version>
+    <gax.version>2.18.3</gax.version>
     <google.api-common.version>2.2.1</google.api-common.version>
     <google.common-protos.version>2.9.0</google.common-protos.version>
     <google.iam.version>1.4.1</google.iam.version>