version sufix

app/build.gradle

@@ -13,6 +13,7 @@ android {
         versionCode 2
         versionName "0.1.2"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+        versionNameSuffix 'preview'
     }
     buildTypes {
         release {
@@ -28,7 +29,7 @@ android {
 }
 
 dependencies {
-    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation fileTree(include: ['*.jar'], dir: 'libs')
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
     implementation 'com.android.support:appcompat-v7:28.0.0'
     implementation 'com.android.support.constraint:constraint-layout:1.1.3'
@@ -38,12 +39,10 @@ dependencies {
     androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
     implementation 'com.android.support:recyclerview-v7:28.0.0'
     implementation 'android.arch.navigation:navigation-fragment:1.0.0-alpha06'
-
-    implementation "android.arch.persistence.room:runtime:1.1.1"
+    implementation 'android.arch.persistence.room:runtime:1.1.1'
     annotationProcessor "android.arch.persistence.room:compiler:1.1.1"
-    androidTestImplementation "android.arch.persistence.room:testing:1.1.1"
-
-    implementation "android.arch.lifecycle:extensions:1.1.1"
+    androidTestImplementation 'android.arch.persistence.room:testing:1.1.1'
+    implementation 'android.arch.lifecycle:extensions:1.1.1'
     annotationProcessor "android.arch.lifecycle:compiler:1.1.1"
     implementation 'com.android.support:cardview-v7:28.0.0'
 }