Update dagger to 2.15

Author: friederbluemle

app/build.gradle

@@ -26,8 +26,8 @@ dependencies {
     testImplementation 'junit:junit:4.12'
     implementation 'com.android.support.constraint:constraint-layout:1.0.2'
 
-    implementation 'com.google.dagger:dagger:2.13'
-    annotationProcessor 'com.google.dagger:dagger-compiler:2.13'
-    annotationProcessor 'com.google.dagger:dagger-android-processor:2.13'
-    implementation 'com.google.dagger:dagger-android-support:2.13'
+    implementation 'com.google.dagger:dagger:2.15'
+    annotationProcessor 'com.google.dagger:dagger-compiler:2.15'
+    annotationProcessor 'com.google.dagger:dagger-android-processor:2.15'
+    implementation 'com.google.dagger:dagger-android-support:2.15'
 }