Update to Scala 2.12.1 - refs #235. Add topics to config.json - refs #125. (#256)

Author: ricemery

config.json

@@ -418,6 +418,8 @@
       "slug": "sgf-parsing",
       "difficulty": 1,
       "topics": [
+        "Parsing",
+        "Transforming"
       ]
 		},
     {

exercises/sgf-parsing/build.sbt

@@ -1,7 +1,6 @@
-scalaVersion := "2.11.8"
-
-libraryDependencies += "org.scalatest" % "scalatest_2.11" % "2.2.5" % "test"
+scalaVersion := "2.12.1"
 
+libraryDependencies += "org.scalatest" %% "scalatest" % "3.0.1" % "test"
 libraryDependencies += "org.scala-lang.modules" %% "scala-parser-combinators" % "1.0.4"