Set javac compiler release to Java 8

mockito.spec

@@ -2,7 +2,7 @@
 
 Name:           mockito
 Version:        3.12.4
-Release:        3%{?dist}
+Release:        4%{?dist}
 Summary:        Tasty mocking framework for unit tests in Java
 License:        MIT
 URL:            https://site.mockito.org/
@@ -111,7 +111,7 @@ EOF
 %build
 # See the usage of exec-maven-plugin in the pom
 mkdir -p target/classes/
-javac -d target/classes/ src/main/java/org/mockito/internal/creation/bytebuddy/inject/MockMethodDispatcher.java
+javac --release 8 -d target/classes/ src/main/java/org/mockito/internal/creation/bytebuddy/inject/MockMethodDispatcher.java
 mv target/classes/org/mockito/internal/creation/bytebuddy/inject/MockMethodDispatcher.{class,raw}
 
 %mvn_build -f -- -Dproject.build.sourceEncoding=UTF-8
@@ -128,7 +128,7 @@ cd -
 cd subprojects/junit-jupiter
 mkdir -p target/classes/
 CLASSPATH=$(build-classpath apiguardian junit5/junit-jupiter-api junit5/junit-platform-commons)
-javac -d target/classes/ \
+javac --release 8 -d target/classes/ \
       -cp ../../target/mockito-core-%{version}.jar:$CLASSPATH \
       src/main/java/org/mockito/junit/jupiter/*.java
 jar -cf ../../target/mockito-junit-jupiter.unwrapped.jar -C target/classes org
@@ -157,6 +157,9 @@ bnd wrap --properties osgi-junit-jupiter.bnd --version %{version} \
 %license LICENSE
 
 %changelog
+* Sat Apr 09 2022 Didik Supriadi <didiksupriadi41@fedoraproject.org> - 3.12.4-4
+- Set javac compiler release to Java 8
+
 * Sat Feb 05 2022 Jiri Vanek <jvanek@redhat.com> - 3.12.4-3
 - Rebuilt for java-17-openjdk as system jdk