Merge pull request #331 from librespot-org/dependabot/maven/com.google.protobuf-protobuf-java-3.15.7

Bump protobuf-java from 3.15.6 to 3.15.7

Author: devgianlu

pom.xml

@@ -38,7 +38,7 @@
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
         <gson.version>2.8.6</gson.version>
-        <protobuf.version>3.15.6</protobuf.version>
+        <protobuf.version>3.15.7</protobuf.version>
     </properties>
 
     <modules>