Update compile and targetSdkVersion to 27

Author: friederbluemle

app/build.gradle

@@ -1,12 +1,11 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 25
-    buildToolsVersion '26.0.2'
+    compileSdkVersion 27
     defaultConfig {
         applicationId "iammert.com.dagger_android_injection"
         minSdkVersion 15
-        targetSdkVersion 25
+        targetSdkVersion 27
         versionCode 1
         versionName "1.0"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
@@ -23,7 +22,7 @@ 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-v7:27.1.0'
     testImplementation 'junit:junit:4.12'
     implementation 'com.android.support.constraint:constraint-layout:1.0.2'