deps: update core dependencies to v1.93.1 (#113)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [com.google.cloud:google-cloud-core](https://togithub.com/googleapis/java-core) | patch | `1.93.0` -> `1.93.1` |
| [com.google.cloud:google-cloud-core-bom](https://togithub.com/googleapis/java-core) | patch | `1.93.0` -> `1.93.1` |

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### Release Notes

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

### [`v1.93.1`](https://togithub.com/googleapis/java-core/blob/master/CHANGELOG.md#&#8203;1931httpswwwgithubcomgoogleapisjava-corecomparev1930v1931-2020-02-28)

[Compare Source](https://togithub.com/googleapis/java-core/compare/v1.93.0...v1.93.1)

</details>

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pom.xml

@@ -63,7 +63,7 @@
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
     <github.global.server>github</github.global.server>
     <site.installationModule>google-cloud-logging-parent</site.installationModule>
-    <google.core.version>1.93.0</google.core.version>
+    <google.core.version>1.93.1</google.core.version>
     <google.api-common.version>1.8.1</google.api-common.version>
     <google.common-protos.version>1.17.0</google.common-protos.version>
     <gax.version>1.54.0</gax.version>