fix(ci): attempt to fix ci

Author: RobinPcrd

pom.xml

@@ -243,8 +243,8 @@
           </execution>
         </executions>
         <configuration>
-          <source>1.8</source>
-          <target>1.8</target>
+          <source>1.7</source>
+          <target>1.7</target>
           <compilerArgs>
             <arg>-Xlint:unchecked</arg>
           </compilerArgs>