Update compile and targetSdkVersion to 28

Author: friederbluemle

app/build.gradle

@@ -1,12 +1,11 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 25
-    buildToolsVersion '26.0.2'
+    compileSdkVersion 28
     defaultConfig {
         applicationId "iammert.com.dagger_android_injection"
         minSdkVersion 15
-        targetSdkVersion 25
+        targetSdkVersion 28
         versionCode 1
         versionName "1.0"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
@@ -20,12 +19,10 @@ android {
 }
 
 dependencies {
-    androidTestImplementation('com.android.support.test.espresso:espresso-core:2.2.2', {
-        exclude group: 'com.android.support', module: 'support-annotations'
-    })
-    implementation 'com.android.support:appcompat-v7:25.4.0'
+    implementation 'com.android.support:appcompat-v7:28.0.0'
     testImplementation 'junit:junit:4.12'
-    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
+    androidTestImplementation 'com.android.support.test:runner:1.0.2'
+    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
 
     implementation 'com.google.dagger:dagger:2.13'
     annotationProcessor 'com.google.dagger:dagger-compiler:2.13'