Update build to JDK 11, Scala 2.12.7, Sbt 1.2.3

Author: Andriy Plokhotnyuk

.travis.yml

@@ -2,15 +2,14 @@ language: scala
 matrix:
   include:
     - os: linux
-      jdk: oraclejdk9
-      scala: 2.12.4
-      addons:
-        apt:
-          packages:
-            - oracle-java9-installer # Forces use of newer JDK 9 build
+      jdk: oraclejdk11
+      scala: 2.12.7
     - os: linux
       jdk: openjdk8
-      scala: 2.12.4
+      scala: 2.12.7
+    - os: linux
+      jdk: oraclejdk11
+      scala: 2.11.12
     - os: linux
       jdk: oraclejdk8
       scala: 2.11.12

build.sbt

@@ -48,7 +48,7 @@ lazy val commonSettings = Seq(
       url = url("https://github.com/AnderEnder")
     ),
   ),
-  scalaVersion := "2.12.6",
+  scalaVersion := "2.12.7",
   resolvers += Resolver.jcenterRepo,
   scalacOptions ++= Seq(
     "-deprecation",
@@ -100,7 +100,7 @@ lazy val `fsi-macros` = project
   .settings(mimaSettings: _*)
   .settings(publishSettings: _*)
   .settings(
-    crossScalaVersions := Seq("2.13.0-M4", "2.12.6", "2.11.12"),
+    crossScalaVersions := Seq("2.13.0-M4", "2.12.7", "2.11.12"),
     libraryDependencies ++= Seq(
       "org.scala-lang" % "scala-reflect" % scalaVersion.value,
       "org.scalatest" %% "scalatest" % "3.0.6-SNAP2" % Test
@@ -113,7 +113,7 @@ lazy val `fsi-benchmark-core` = project
   .settings(commonSettings: _*)
   .settings(noPublishSettings: _*)
   .settings(
-    crossScalaVersions := Seq("2.13.0-M4", "2.12.6", "2.11.12"),
+    crossScalaVersions := Seq("2.13.0-M4", "2.12.7", "2.11.12"),
     libraryDependencies ++= Seq(
       "pl.project13.scala" % "sbt-jmh-extras" % "0.3.4",
       "org.scalatest" %% "scalatest" % "3.0.6-SNAP2" % Test
@@ -126,7 +126,7 @@ lazy val `fsi-benchmark` = project
   .settings(commonSettings: _*)
   .settings(noPublishSettings: _*)
   .settings(
-    crossScalaVersions := Seq("2.12.6", "2.11.12"),
+    crossScalaVersions := Seq("2.12.7", "2.11.12"),
     libraryDependencies ++= Seq(
       "com.dongxiguo" %% "fastring" % "1.0.0",
       "com.outr" %% "perfolation" % "1.0.4",

project/build.properties

@@ -1 +1 @@
-sbt.version=1.1.2
+sbt.version=1.2.3