upgrade http4k and kotlin

build.gradle

@@ -2,10 +2,6 @@ group 'org.http4k'
 version '1.0-SNAPSHOT'
 
 buildscript {
-    ext.kotlin_version = '1.3.31'
-    ext.http4k_version = '3.140.0'
-    ext.junit_version = '5.4.1'
-
     repositories {
         mavenCentral()
         jcenter()
@@ -27,16 +23,21 @@ repositories {
 }
 
 dependencies {
-    compile "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
+    implementation platform("org.http4k:http4k-bom:$http4k_version")
+    implementation "org.http4k:http4k-core"
+    implementation "org.http4k:http4k-cloudnative"
+    implementation "org.http4k:http4k-server-jetty"
+
+    testImplementation "org.http4k:http4k-testing-hamkrest"
+    testImplementation "org.http4k:http4k-client-websocket"
 
-    compile "org.http4k:http4k-core:$http4k_version"
-    compile "org.http4k:http4k-cloudnative:$http4k_version"
-    compile "org.http4k:http4k-server-jetty:$http4k_version"
+    testImplementation platform("org.junit:junit-bom:$junit_version")
+    testImplementation "org.junit.jupiter:junit-jupiter-api"
+    testImplementation "org.junit.jupiter:junit-jupiter-engine"
+}
 
-    testCompile "org.http4k:http4k-client-websocket:$http4k_version"
-    testCompile "org.junit.jupiter:junit-jupiter-api:$junit_version"
-    testCompile "org.junit.jupiter:junit-jupiter-engine:$junit_version"
-    testCompile "org.http4k:http4k-testing-hamkrest:$http4k_version"
+test {
+    useJUnitPlatform()
 }
 
 mainClassName = 'org.http4k.demo.IrcLauncherKt'

gradle.properties

@@ -0,0 +1,4 @@
+org.gradle.parallel=true
+http4k_version=3.263.0
+junit_version=5.7.0
+kotlin_version=1.4.10

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,5 @@
-#Sat Dec 08 12:30:25 GMT 2018
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.6-all.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.0-all.zip