Maven Validate Warnings

[samihibrahim]

Running any of maven commands (Validate is a good sample) produces the warnings below.

[WARNING] Some problems were encountered while building the effective model for com.g4s8:ghman:jar:1.0-SNAPSHOT
[WARNING] 'dependencies.dependency.(groupId:artifactId:type:classifier)' must be unique: com.jcabi:jcabi-http:jar -> duplicate declaration of version 1.17.2 @ line 117, column 17
[WARNING] 'dependencies.dependency.(groupId:artifactId:type:classifier)' must be unique: org.glassfish:javax.json:jar -> duplicate declaration of version 1.1.4 @ line 154, column 17
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-jar-plugin is missing. @ line 179, column 15

[0crat]

@g4s8/z please, pay attention to this issue