deps: update dependency com.google.cloud:google-cloud-core to v1.93.4 (…

…#138)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [com.google.cloud:google-cloud-core](https://togithub.com/googleapis/java-core) | patch | `1.93.3` -> `1.93.4` |

---

### Release Notes

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

### [`v1.93.4`](https://togithub.com/googleapis/java-core/blob/master/CHANGELOG.md#&#8203;1934-httpswwwgithubcomgoogleapisjava-corecomparev1933v1934-2020-04-06)

[Compare Source](https://togithub.com/googleapis/java-core/compare/v1.93.3...v1.93.4)

</details>

---

### Renovate configuration

:date: **Schedule**: At any time (no schedule defined).

:vertical_traffic_light: **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

:recycle: **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

:no_bell: **Ignore**: Close this PR and you won't be reminded about this update again.

---

 - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box

---

This PR has been generated by [WhiteSource Renovate](https://renovate.whitesourcesoftware.com). View repository job log [here](https://app.renovatebot.com/dashboard#googleapis/java-dialogflow).

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-dialogflow-parent</site.installationModule>
-    <google.core.version>1.93.3</google.core.version>
+    <google.core.version>1.93.4</google.core.version>
     <google.api-common.version>1.9.0</google.api-common.version>
     <google.common-protos.version>1.17.0</google.common-protos.version>
     <gax.version>1.56.0</gax.version>