Update library versions.

app/build.gradle

@@ -4,7 +4,7 @@ apply plugin: 'kotlin-android-extensions'
 
 android {
     compileSdkVersion 27
-    buildToolsVersion '27.0.2'
+    buildToolsVersion '27.0.3'
 
     defaultConfig {
         applicationId "com.yubico.yubioath"
@@ -45,11 +45,11 @@ dependencies {
     implementation 'org.jetbrains.anko:anko-sdk15:0.10.3'
     implementation "org.jetbrains.anko:anko-coroutines:0.10.3"
 
-    implementation 'com.android.support:appcompat-v7:27.0.2'
-    implementation 'com.android.support:design:27.0.2'
-    implementation 'com.android.support:preference-v14:27.0.2'
+    implementation 'com.android.support:appcompat-v7:27.1.1'
+    implementation 'com.android.support:design:27.1.1'
+    implementation 'com.android.support:preference-v14:27.1.1'
 
-    implementation "android.arch.lifecycle:extensions:1.0.0"
+    implementation "android.arch.lifecycle:extensions:1.1.1"
 }
 repositories {
     mavenCentral()

build.gradle

@@ -1,13 +1,13 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.kotlin_version = '1.2.10'
+    ext.kotlin_version = '1.2.40'
     repositories {
         jcenter()
         google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.0.1'
+        classpath 'com.android.tools.build:gradle:3.1.1'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
 
         // NOTE: Do not place your application dependencies here; they belong

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Tue Aug 29 12:05:33 CEST 2017
+#Fri Apr 20 15:54:16 CEST 2018
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip