Bump versions of most dependencies (scala-graph#153)

Affected dependencies: scala, sbt, scala-test, and lift-json

Author: Jentsch

.travis.yml

@@ -1,7 +1,7 @@
 language: scala
 scala:
    - 2.11.11
-   - 2.12.7
+   - 2.12.8
 jdk:
   - oraclejdk8
 script:

build.sbt

@@ -49,7 +49,7 @@ lazy val json = project
     defaultSettings ++ Seq(
       name := "Graph JSON",
       version := Version.json,
-      libraryDependencies += "net.liftweb" %% "lift-json" % "3.0.1"
+      libraryDependencies += "net.liftweb" %% "lift-json" % "3.1.1"
     )
   )
 
@@ -95,7 +95,7 @@ lazy val defaultSettings = Defaults.coreDefaultSettings ++ Seq(
   Test / testOptions := Seq(Tests.Filter(s => s.endsWith("Test"))),
   libraryDependencies ++= Seq(
     "junit"                  % "junit"      % "4.12"  % "test",
-    "org.scalatest"          %% "scalatest" % "3.0.1" % "test",
+    "org.scalatest"          %% "scalatest" % "3.0.8" % "test",
     "org.scala-lang.modules" %% "scala-xml" % "1.0.5" % "test"
   )
 ) ++ GraphSonatype.settings

project/Version.scala

@@ -1,6 +1,6 @@
 object Version {
   val compiler_2_11 = "2.11.12"
-  val compiler_2_12 = "2.12.7"
+  val compiler_2_12 = "2.12.8"
 
   private val isSnapshot = false
   private def snapshot   = if (isSnapshot) "-SNAPSHOT" else ""

project/build.properties

@@ -1 +1 @@
-sbt.version=1.2.4
+sbt.version=1.2.8