Migrate to AndroidX libraries

app/build.gradle

@@ -34,7 +34,7 @@ android {
 }
 
 dependencies {
-    implementation 'com.android.support:design:28.0.0'
+    implementation 'com.google.android.material:material:1.1.0-alpha02'
     testImplementation 'junit:junit:4.12'
     testImplementation 'org.robolectric:robolectric:4.1'
     googleImplementation 'com.google.firebase:firebase-core:16.0.6'