chore(deps): update dependency com.google.cloud:libraries-bom to v4.4.1 (#130)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [com.google.cloud:libraries-bom](https://togithub.com/GoogleCloudPlatform/cloud-opensource-java) | patch | `4.4.0` -> `4.4.1` |

---

### 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-logging).

Source-Author: WhiteSource Renovate <bot@renovateapp.com>
Source-Date: Mon Apr 6 20:02:36 2020 +0200
Source-Repo: googleapis/java-logging
Source-Sha: 8595f43
Source-Link: 8595f43

Author: yoshi-automation

README.md

@@ -17,7 +17,7 @@ If you are using Maven with [BOM][libraries-bom], add this to your pom.xml file
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>libraries-bom</artifactId>
-      <version>4.4.0</version>
+      <version>4.4.1</version>
       <type>pom</type>
       <scope>import</scope>
     </dependency>

synth.metadata

@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-logging.git",
-        "sha": "6f4fae2141662f0421364ea25f738366f3feaf41"
+        "sha": "8595f4342e9599afcdf0f5c4631d6dafdcecaa08"
       }
     },
     {