Improve packaging

Author: kovzol

build.gradle

@@ -151,6 +151,7 @@ dependencies {
             'org.graphper:graph-support:1.4.0',
             'ch.qos.logback:logback-core:1.2.9',
             'org.slf4j:slf4j-simple:2.0.7',
+            'org.slf4j:slf4j-api:2.0.7',
             'xml-apis:xml-apis:1.4.01',
             'xml-apis:xml-apis-ext:1.3.04',
             'commons-cli:commons-cli:1.4'