Update dependencies to support Scala 2.12

[ikuzart]

This changes will allow to use Scala 2.12

Changes to be able to compile with Scala 2.12

• org.scala-lang >> scala-library 2.11.12 => 2.12.15
• _org.scala-lang.modules >> scala-parser-combinators2.11 => _scala-parser-combinators2.12, 1.0.3 => 2.1.1
• org.scalatest: scalatest_2.11 2.2.6 => 3.2.12

Due to changes in scalatest some tests imports needed to be change too.

Changes for vulnerable dependencies:

org.slf4j >> slf4j-log4j12 => slf4j-reload4j, 1.7.22 => 2.0.6 log4j >> log4j 1.2.17 -> org.apache.logging.log4j >> log4j-core 2.20.0 com.sun.jersey >> jersey-json 1.19 => org.codehaus.jettison >> jettison 1.5.3

[ikuzart]

@Erechtheus Thank you for merging this PR! by the way, can these changes be compiled to a new release version?

[Erechtheus]

@ikuzart I created a new version tag 1.4.0 (https://github.com/rockt/SETH/releases/tag/1.4.0)