Set explicit Java compiler source/target levels to 1.7

jsch.spec

@@ -1,6 +1,6 @@
 Name:           jsch
 Version:        0.1.55
-Release:        4%{?dist}
+Release:        5%{?dist}
 Summary:        Pure Java implementation of SSH2
 License:        BSD
 URL:            http://www.jcraft.com/jsch/
@@ -43,7 +43,7 @@ Summary:        Javadoc for %{name}
 %pom_xpath_set pom:project/pom:version %{version}
 
 %build
-%mvn_build
+%mvn_build -- -Dmaven.compiler.source=1.7 -Dmaven.compiler.target=1.7
 
 # inject the OSGi Manifest
 mkdir META-INF
@@ -64,6 +64,9 @@ zip target/%{name}-%{version}.jar plugin.properties
 %license LICENSE.txt
 
 %changelog
+* Tue Nov 02 2021 Mikolaj Izdebski <mizdebsk@redhat.com> - 0.1.55-5
+- Set explicit Java compiler source/target levels to 1.7
+
 * Thu Jul 22 2021 Fedora Release Engineering <releng@fedoraproject.org> - 0.1.55-4
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_35_Mass_Rebuild