Bump org.sonatype.plugins:nexus-staging-maven-plugin

Bumps org.sonatype.plugins:nexus-staging-maven-plugin from 1.6.13 to 1.7.0.

---
updated-dependencies:
- dependency-name: org.sonatype.plugins:nexus-staging-maven-plugin
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

pom.xml

@@ -57,7 +57,7 @@
         <maven-javadoc-version>3.6.3</maven-javadoc-version>
         <maven-gpg-version>3.2.4</maven-gpg-version>
         <maven-source-version>3.3.1</maven-source-version>
-        <sonatype-staging-version>1.6.13</sonatype-staging-version>
+        <sonatype-staging-version>1.7.0</sonatype-staging-version>
     </properties>
 
     <dependencies>