Update extractor version to 0.21.0

Author: TobiGr

app/build.gradle

@@ -192,7 +192,7 @@ dependencies {
 
     // NewPipe dependencies
     // You can use a local version by uncommenting a few lines in settings.gradle
-    implementation 'com.github.TeamNewPipe:NewPipeExtractor:def745b801b2ef35c1a0fee1be950331ca6a0cd2'
+    implementation 'com.github.TeamNewPipe:NewPipeExtractor:v0.21.0'
     implementation "com.github.TeamNewPipe:nanojson:1d9e1aea9049fc9f85e68b43ba39fe7be1c1f751"
 
     implementation "org.jsoup:jsoup:1.13.1"