title: Failed to resolve: androidx.lifecycle:lifecycle-extensions-ktx:2.0.0-alpha1
body: <p>I am trying to understand ViewModel and LiveData concepts in android. I am making a practice project but when i added <code>implementation 'androidx.lifecycle:lifecycle-extensions-ktx:2.0.0-alpha1'</code> line in my app level gradle file it shows me </p>
  
  <blockquote>
    <p>Failed to resolve:
    androidx.lifecycle:lifecycle-extensions-ktx:2.0.0-alpha1.</p>
  </blockquote>
  
  <p>I have searched on google for solution and i found <a href="https://stackoverflow.com/a/50781666/7804719">this</a> answer, it works when i compile only viewmodel library but if i compile extensions library using same method as <code>implementation group: 'androidx.lifecycle', name:'lifecycle-extensions-ktx', version: '2.0.0-alpha1'</code>, it shows the same error as above.
  I have also tried to find it on Maven repositories site <a href="https://mvnrepository.com/artifact/androidx.lifecycle/lifecycle-extensions" rel="noreferrer">here</a> but i didn't have any information for how to compile it.</p>
  
  <h1>UPDATE</h1>
  
  <h3>App Level Build.gradle</h3>
  
  <pre><code>apply plugin: 'com.android.application'
  
  apply plugin: 'kotlin-android'
  
  apply plugin: 'kotlin-android-extensions'
  
  android {
      compileSdkVersion 28
      defaultConfig {
          applicationId "***************"
          minSdkVersion 19
          targetSdkVersion 28
          versionCode 1
          versionName "1.0"
          testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
      }
      buildTypes {
          release {
              minifyEnabled false
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
          }
      }
  }
  
  dependencies {
      implementation fileTree(dir: 'libs', include: ['*.jar'])
      implementation "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
      implementation 'com.android.support:appcompat-v7:28.0.0-alpha3'
      implementation 'com.android.support.constraint:constraint-layout:1.1.2'
      testImplementation 'junit:junit:4.12'
      androidTestImplementation 'com.android.support.test:runner:1.0.2'
      androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
      implementation group: 'androidx.lifecycle', name:'lifecycle-extensions-ktx', version: '2.0.0-alpha1'
      implementation group: 'androidx.lifecycle', name:'lifecycle-viewmodel-ktx', version: '2.0.0-alpha1'
  }
  </code></pre>