DTB-Crashes on ID3 2.2.0

[neilweber]

Describe the bug
When parsing the MP3s in my library, the processor crashed with this stack trace:

Unhandled exception:
NoSuchMethodError: The method 'decode' was called on null.
Receiver: null
Tried calling: decode(Uint8Array)
#0 Object.noSuchMethod (dart:core-patch/object_patch.dart:51:5)
#1 ID3V2Reader.parseValues (package:dart_tags/src/readers/id3v2.dart:71:23)
#2 Reader.read. (package:dart_tags/src/readers/reader.dart:13:23)
#3 _RootZone.runUnary (dart:async/zone.dart:1450:54)
#4 _FutureListener.handleValue (dart:async/future_impl.dart:143:18)
#5 Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:696:45)
#6 Future._propagateToListeners (dart:async/future_impl.dart:725:32)
#7 Future._addListener. (dart:async/future_impl.dart:393:9)
#8 _microtaskLoop (dart:async/schedule_microtask.dart:41:21)
#9 _startMicrotaskLoop (dart:async/schedule_microtask.dart:50:5)
#10 _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:120:13)
#11 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:185:5)

Environment

• Platform DartVM on Windows 10
• Library version: 0.3.1
• Tag type ID3v2.2.0

Expected behavior
Parses and returns tags correctly.