Update build to Gradle 4.1

Author: JLLeitschuh

gradle/wrapper/gradle-wrapper.jar

@@ -1,6 +1,5 @@
-#Thu Jun 01 17:43:15 EDT 2017
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-3.5-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip

gradle/wrapper/gradle-wrapper.properties

@@ -33,11 +33,11 @@ DEFAULT_JVM_OPTS=""
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD="maximum"
 
-warn ( ) {
+warn () {
     echo "$*"
 }
 
-die ( ) {
+die () {
     echo
     echo "$*"
     echo
@@ -155,13 +155,14 @@ if $cygwin ; then
 fi
 
 # Escape application args
-for s in "${@}" ; do
-    s=\"$s\"
-    APP_ARGS=$APP_ARGS" "$s
-done
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=$(save "$@")
 
 # Collect all arguments for the java command, following the shell quoting and substitution rules
-eval set -- "$DEFAULT_JVM_OPTS" "$JAVA_OPTS" "$GRADLE_OPTS" "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
 
 # by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
 if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then

gradlew

@@ -1,5 +1,6 @@
 import org.gradle.api.publish.maven.MavenPublication
 import org.gradle.api.tasks.bundling.Jar
+import org.gradle.api.tasks.wrapper.Wrapper
 
 buildscript {
     repositories {
@@ -55,9 +56,9 @@ subprojects {
     }
 
     dependencies {
-        compile(kotlinModule("stdlib"))
-        compile(kotlinModule("reflect"))
-        testCompile(group = "io.kotlintest", name = "kotlintest", version = "2.0.2")
+        "compile"(kotlin("stdlib"))
+        "compile"(kotlin("reflect"))
+        "testCompile"(create(group = "io.kotlintest", name = "kotlintest", version = "2.0.2"))
     }
 
     val sourceJarTask = task<Jar>("sourceJar") {
@@ -80,6 +81,12 @@ subprojects {
 
 configurations.create(PUBLISHED_CONFIGURATION_NAME)
 
+task<Wrapper>("wrapper") {
+    description = "Configure the version of gradle to download and use"
+    gradleVersion = "4.1"
+    distributionType = Wrapper.DistributionType.ALL
+}
+
 /**
  * Retrieves or configures the [bintray][com.jfrog.bintray.gradle.BintrayExtension] project extension.
  */