[iOS CRASH] Fatal error: Unexpectedly found nil while unwrapping an Optional value

hi, I'm using this plugin for compress target video, and got a crash with log below:

```
video_compress/SwiftVideoCompressPlugin.swift:203: Fatal error: Unexpectedly found nil while unwrapping an Optional value
video_compress/SwiftVideoCompressPlugin.swift:203: Fatal error: Unexpectedly found nil while unwrapping an Optional value
* thread #1, queue = 'com.apple.main-thread', stop reason = Fatal error: Unexpectedly found nil while unwrapping an Optional value
frame #0: 0x00000001c25a2458 libswiftCore.dylib`_swift_runtime_on_report
libswiftCore.dylib`:
-> 0x1c25a2458 <+0>: ret
libswiftCore.dylib`:
0x1c25a245c <+0>: b 0x1c25a2458 ; _swift_runtime_on_report
libswiftCore.dylib`:
0x1c25a2460 <+0>: adrp x8, 335064
0x1c25a2464 <+4>: ldrb w0, [x8, #0x45c]
Target 0: (Runner) stopped.
```

Tip:
maybe related issue : https://github.com/pichillilorenzo/flutter_inappwebview/issues/1173