Adjust versions for library

Author: fornewid

start/build.gradle

@@ -1,29 +1,29 @@
 apply plugin: 'com.android.application'
 apply plugin: 'kotlin-android'
 apply plugin: 'kotlin-android-extensions'
-android {
-    compileSdkVersion 29
-    buildToolsVersion "29.0.0"
 
+android {
+    compileSdkVersion 28
+    buildToolsVersion "28.0.3"
 
     defaultConfig {
         applicationId "soup.codelab.darktheme"
         minSdkVersion 21
-        targetSdkVersion 29
+        targetSdkVersion 28
         versionCode 1
         versionName "1.0"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
-
     }
-
     buildTypes {
         release {
             minifyEnabled false
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
         }
     }
-
+    dataBinding {
+        enabled = true
+    }
 }
 
 dependencies {
@@ -32,6 +32,9 @@ dependencies {
     implementation 'androidx.appcompat:appcompat:1.0.2'
     implementation 'androidx.core:core-ktx:1.0.2'
     implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
+    implementation 'com.google.android.material:material:1.0.0'
+    implementation 'com.airbnb.android:lottie:3.0.7'
+    implementation 'com.jakewharton.timber:timber:4.7.1'
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'androidx.test:runner:1.2.0'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'