Update robolectric library

app/build.gradle

@@ -26,13 +26,19 @@ android {
             buildConfigField "boolean", "HIDDEN_APP", "true"
         }
     }
+
+    testOptions {
+        unitTests {
+            includeAndroidResources = true
+        }
+    }
 }
 
 dependencies {
     implementation 'com.android.support:design:28.0.0-rc01'
     implementation 'com.mapzen.android:lost:3.0.4'
     testImplementation 'junit:junit:4.12'
-    testImplementation 'org.robolectric:robolectric:3.6.1'
+    testImplementation 'org.robolectric:robolectric:3.8'
     googleImplementation 'com.google.firebase:firebase-core:16.0.1'
     googleImplementation 'com.crashlytics.sdk.android:crashlytics:2.9.4'
 }