update docker executor dependencies

Author: viktortnk

build.sbt

@@ -55,7 +55,7 @@ lazy val testkitSpotifyImpl =
     .settings(
       name := "docker-testkit-impl-spotify",
       libraryDependencies ++=
-        Seq("com.spotify" % "docker-client" % "8.3.1",
+        Seq("com.spotify" % "docker-client" % "8.4.0",
             "com.google.code.findbugs" % "jsr305" % "3.0.1"))
     .dependsOn(core)
 
@@ -65,7 +65,7 @@ lazy val testkitDockerJavaImpl =
     .settings(
       name := "docker-testkit-impl-docker-java",
       libraryDependencies ++=
-        Seq("com.github.docker-java" % "docker-java" % "3.0.8",
+        Seq("com.github.docker-java" % "docker-java" % "3.0.9",
             "com.google.code.findbugs" % "jsr305" % "3.0.1"))
     .dependsOn(core)
 
@@ -83,7 +83,7 @@ lazy val scalatest =
       name := "docker-testkit-scalatest",
       libraryDependencies ++=
         Seq(
-          "org.scalatest" %% "scalatest" % "3.0.1",
+          "org.scalatest" %% "scalatest" % "3.0.3",
           "ch.qos.logback" % "logback-classic" % "1.1.7" % "test",
           "org.postgresql" % "postgresql" % "9.4.1210" % "test"))
     .dependsOn(core, testkitSpotifyImpl % "test", testkitDockerJavaImpl % "test", samples % "test")
@@ -108,7 +108,7 @@ lazy val config =
       libraryDependencies ++=
         Seq(
           "com.iheart" %% "ficus" % "1.4.0",
-          "org.scalatest" %% "scalatest" % "3.0.1" % "test"),
+          "org.scalatest" %% "scalatest" % "3.0.3" % "test"),
       publish := scalaVersion map {
         case x if x.startsWith("2.10") => {}
         case _ => publish.value