deps: update dependency io.grafeas:grafeas to v1 (#833)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [io.grafeas:grafeas](https://togithub.com/googleapis/java-grafeas) | major | `0.25.0` -> `1.0.0` |

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### Release Notes

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

### [`v1.0.0`](https://togithub.com/googleapis/java-grafeas/blob/master/CHANGELOG.md#&#8203;100-httpswwwgithubcomgoogleapisjava-grafeascomparev0250v100-2020-08-12)

[Compare Source](https://togithub.com/googleapis/java-grafeas/compare/v0.25.0...v1.0.0)

##### Features

-   promote to 1.0.0 ([#&#8203;133](https://www.github.com/googleapis/java-grafeas/issues/133)) ([31eeadf](https://www.github.com/googleapis/java-grafeas/commit/31eeadf1cdc676d5eb7cd483d168005ff70935ac))

</details>

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pom.xml

@@ -607,7 +607,7 @@
       <dependency>
         <groupId>io.grafeas</groupId>
         <artifactId>grafeas</artifactId>
-        <version>0.25.0</version>
+        <version>1.0.0</version>
       </dependency>
     </dependencies>
   </dependencyManagement>