Fix build issues.

Author: wenbinf

app/build.gradle

@@ -20,11 +20,11 @@ repositories {
 }
 
 dependencies {
-    // Use Scala 2.13 in our library project
-    implementation 'org.scala-lang:scala-library:2.13.3'
+    // Use Scala 2.13.16 in our library project
+    implementation 'org.scala-lang:scala-library:2.13.16'
 
     // This dependency is used by the application.
-    implementation 'com.google.guava:guava:30.0-jre'
+    implementation 'com.google.guava:guava:33.4.0-jre'
 
     // Podcast API
     implementation "com.listennotes:podcast-api:1.1.6"