Update dependency libraries

[ngocdaothanh]

The main purpose is to update jquery-validation from 1.18.0 to 1.19.0; see jquery-validation/jquery-validation#2233

Other updates:

• Scala from 2.12.7 to 2.12.8
• Netty from 4.1.31 to 4.1.32
• netty-tcnative from 2.0.19.Final to 2.0.20.Final
• Akka from 2.5.17 to 2.5.19
• metrics4-scala from 4.0.1 to 4.0.3
• sockjs-client from 1.1.5 to 1.3.0