build(deps): update dependency com.google.cloud:google-cloud-shared-c…

…onfig to v0.8.0 (#340)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [com.google.cloud:google-cloud-shared-config](https://togithub.com/googleapis/java-shared-config) | minor | `0.7.0` -> `0.8.0` |

---

### Release Notes

<details>
<summary>googleapis/java-shared-config</summary>

### [`v0.8.0`](https://togithub.com/googleapis/java-shared-config/blob/master/CHANGELOG.md#&#8203;080-httpswwwgithubcomgoogleapisjava-shared-configcomparev070v080-2020-06-10)

[Compare Source](https://togithub.com/googleapis/java-shared-config/compare/v0.7.0...v0.8.0)

##### Features

-   revert "feat: mark auto-value-annotations scope as provided" ([#&#8203;154](https://www.github.com/googleapis/java-shared-config/issues/154)) ([88afb4e](https://www.github.com/googleapis/java-shared-config/commit/88afb4e7c57cb6e00929c098135314a926d9da30))

</details>

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### Renovate configuration

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: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

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google-cloud-bigtable-bom/pom.xml

@@ -8,7 +8,7 @@
     <parent>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-shared-config</artifactId>
-        <version>0.7.0</version>
+        <version>0.8.0</version>
     </parent>
 
     <name>Google Cloud Bigtable BOM</name>

google-cloud-bigtable-deps-bom/pom.xml

@@ -7,7 +7,7 @@
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-shared-config</artifactId>
-    <version>0.7.0</version>
+    <version>0.8.0</version>
   </parent>
 
   <groupId>com.google.cloud</groupId>

pom.xml

@@ -14,7 +14,7 @@
     <parent>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-shared-config</artifactId>
-        <version>0.7.0</version>
+        <version>0.8.0</version>
     </parent>
 
     <developers>