versions in grouper ws should be more flexible

right now there are enums, which means if the client is upgraded, and not the server, it will be a failure. Here are examples of what we want

//cli -> ser -> ok?
//1.5.2 -> 1.5.2 -> T
//1.5.2 -> 1.5.1 -> T
//1.5.1 -> 1.5.2 -> T
//1.5.2 -> 1.4.0 -> F (released before 1.5.2)
//1.5.2 -> 1.4.5 -> F (released after 1.5.2)
//1.4.0 -> 1.5.2 -> T (released before 1.5.2)
//1.4.5 -> 1.5.2 -> T (released after 1.5.2)
//1.6.0 -> 1.5.2 -> F
//1.5.2 -> 1.6.0 -> T
//2.0.0 -> 1.5.2 -> F
//1.5.2 -> 2.0.0 -> T