chore(deps): update dependency com.github.wvengen:proguard-maven-plugin to v2.7.0

Author: renovate[bot]

pom.xml

@@ -559,7 +559,7 @@
           <plugin>
             <groupId>com.github.wvengen</groupId>
             <artifactId>proguard-maven-plugin</artifactId>
-            <version>2.6.1</version>
+            <version>2.7.0</version>
             <executions>
               <execution>
                 <phase>verify</phase>