deps: update dependency org.threeten:threetenbp to v1.4.4 (#55)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [org.threeten:threetenbp](https://www.threeten.org/threetenbp) ([source](https://github.com/ThreeTen/threetenbp)) | patch | `1.4.3` -> `1.4.4` |

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### Release Notes

<details>
<summary>ThreeTen/threetenbp</summary>

### [`v1.4.4`](https://github.com/ThreeTen/threetenbp/releases/v1.4.4)

[Compare Source](https://github.com/ThreeTen/threetenbp/compare/v1.4.3...v1.4.4)

See the [change notes](https://www.threeten.org/threetenbp/changes-report.html) for more information.

</details>

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pom.xml

@@ -71,7 +71,7 @@
     <protobuf.version>3.11.4</protobuf.version>
     <junit.version>4.13</junit.version>
     <guava.version>29.0-android</guava.version>
-    <threeten.version>1.4.3</threeten.version>
+    <threeten.version>1.4.4</threeten.version>
     <javax.annotations.version>1.3.2</javax.annotations.version>
     <animal-sniffer.version>1.18</animal-sniffer.version>
   </properties>