Conflicting dependencies

Hi,
Using [`com.jcabi:jcabi-github`](http://search.maven.org/#search%7Cgav%7C1%7Cg%3A%22com.jcabi%22%20AND%20a%3A%22jcabi-github%22):0.32 ([POM](https://repo1.maven.org/maven2/com/jcabi/jcabi-github/0.32/jcabi-github-0.32.pom)) makes my project fail when I use other APIs related to Rest, Json, or the like. The 0.32 version relies on quite old dependencies, because of its parent, `com.jcabi:jcabi:1.20.1` ([POM](https://repo1.maven.org/maven2/com/jcabi/jcabi/1.20.1/jcabi-1.20.1.pom)), more precisely because of the parent of `com.jcabi:jcabi:1.20.1`, which is `com.jcabi:parent:0.37.1` ([POM](https://repo1.maven.org/maven2/com/jcabi/parent/0.37.1/parent-0.37.1.pom)).

Please update!