title: Failed to resolve: com.google.android.material:material:1.0.0-alpha1
body: <p>So I'm following the official documentation to add the Material Components library to my project <a href="https://github.com/material-components/material-components-android/blob/master/docs/getting-started.md" rel="noreferrer">https://github.com/material-components/material-components-android/blob/master/docs/getting-started.md</a></p>
  
  <p>But it throws me the following error 
  "Failed to resolve: com.google.android.material:material:1.0.0-alpha1"</p>
  
  <p>I've tried installing the repository and sync project that Android Studio suggest to no avail.</p>
  
  <p>My project config</p>
  
  <pre><code>buildscript {
  
  repositories {
      google()
      jcenter()
  }
  dependencies {
      classpath 'com.android.tools.build:gradle:3.1.2'
  
  
      // NOTE: Do not place your application dependencies here; they belong
      // in the individual module build.gradle files
      classpath 'com.google.gms:google-services:3.2.1'
  }
  }
  
  allprojects {
  repositories {
      google()
      jcenter()
      maven {
          url "https://maven.google.com"
      }
  }
  
  
  task clean(type: Delete) {
  delete rootProject.buildDir
  }
  </code></pre>
  
  <p>and the app config</p>
  
  <pre><code>apply plugin: 'com.android.application'
  
  android {
  compileSdkVersion 27
  defaultConfig {
      applicationId "mlluell.eftremp"
      minSdkVersion 21
      targetSdkVersion 27
      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 'com.android.support:appcompat-v7:27.1.1'
  implementation 'com.android.support:cardview-v7:27.1.1'
  implementation 'com.android.support:customtabs:27.1.1'
  implementation 'com.android.support.constraint:constraint-layout:1.1.0'
  implementation 'com.google.firebase:firebase-auth:15.1.0'
  implementation 'com.google.android.gms:play-services-auth:15.0.1'
  implementation 'com.google.firebase:firebase-database:15.0.1'
  implementation 'com.google.firebase:firebase-storage:15.0.2'
  implementation 'com.android.support:design:27.1.1'
  implementation 'com.android.support:appcompat-v7:27.1.1'
  implementation 'com.google.android.material:material:1.0.0-alpha1'
  
  //imatges recyclerview
  implementation 'com.android.support:recyclerview-v7:27.1.1'
  implementation 'com.github.bumptech.glide:glide:4.6.1'
  annotationProcessor 'com.github.bumptech.glide:compiler:4.6.1'
  
  // FirebaseUI for Firebase Realtime Database
  implementation 'com.firebaseui:firebase-ui-database:3.3.0'
  
  // FirebaseUI for Firebase Auth
  implementation 'com.firebaseui:firebase-ui-auth:3.3.0'
  
  // FirebaseUI for Cloud Storage
  implementation 'com.firebaseui:firebase-ui-storage:3.3.0'
  
  
  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'
  }
  
  apply plugin: 'com.google.gms.google-services'
  </code></pre>