build: update gradle, build tools.

.travis.yml

@@ -7,7 +7,7 @@ android:
     - platform-tools
     - tools
     - extra-android-m2repository
-    - build-tools-27.0.3
+    - build-tools-28.0.2
     - android-27
 
 script: cd Clover && ./gradlew build --console plain -x lint

Clover/app/build.gradle

@@ -15,7 +15,7 @@ def getCommitHash = { ->
 android {
     compileSdkVersion 27
     // update the travis config when changing this
-    buildToolsVersion '27.0.3'
+    buildToolsVersion '28.0.2'
 
     defaultConfig {
         minSdkVersion 15

Clover/build.gradle

@@ -5,7 +5,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.1.3'
+        classpath 'com.android.tools.build:gradle:3.2.0'
     }
 }
 

Clover/gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Wed Mar 28 12:15:28 CEST 2018
+#Sat Oct 06 14:30:14 CEST 2018
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.6-all.zip