Update all build scripts

build.gradle

@@ -3,9 +3,13 @@
 buildscript {
     repositories {
         jcenter()
+        maven {
+            url 'https://maven.google.com/'
+            name 'Google'
+        }
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.2.3'
+        classpath 'com.android.tools.build:gradle:3.0.1'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
@@ -15,6 +19,10 @@ buildscript {
 allprojects {
     repositories {
         jcenter()
+        maven {
+            url 'https://maven.google.com/'
+            name 'Google'
+        }
     }
 }
 

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Tue Dec 27 23:36:06 CET 2016
+#Tue Mar 13 17:52:47 EDT 2018
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-3.2.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip

sample/build.gradle

@@ -1,15 +1,13 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 25
-    buildToolsVersion "25.0.2"
+    compileSdkVersion 27
     defaultConfig {
         applicationId "org.polaric.colorful"
         minSdkVersion 14
-        targetSdkVersion 25
+        targetSdkVersion 27
         versionCode 1
         versionName "1.0"
-        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
         vectorDrawables.useSupportLibrary = true
     }
     buildTypes {
@@ -22,6 +20,6 @@ android {
 
 dependencies {
     compile project(':library')
-    compile 'com.android.support:appcompat-v7:25.3.1'
-    compile 'com.android.support:preference-v14:25.3.1'
+    compile 'com.android.support:appcompat-v7:27.1.0'
+    compile 'com.android.support:preference-v14:27.1.0'
 }