[Bug]Can't build project by XCode 12 (after update)

[torindev]

BUG REPORTS WITHOUT PROVIDING THESE INFORMATIONS WILL BE CLOSED DIRECTLY. DON'T REMOVE THE SECTIONS!

Describe the bug
Can't build project using barcode_scanner by XCode 12 (after update). Error:

Header 'SwiftProtobuf-Swift.h' not found

module SwiftProtobuf.Swift {
    header "SwiftProtobuf-Swift.h".      <-----
    requires objc
}

To Reproduce
Steps to reproduce the behavior:

1. Try to build project in XCode 12, using barcode_scanner
2. Got fail

Expected behavior

1. Try to build project in XCode 12, using barcode_scanner
2. Got success

Screenshots

Logs

<unknown>:0: error: could not build Objective-C module 'SwiftProtobuf'

Environment (please complete the following information):

• [*] iOS? Version: 14
• Android? Version: ...
• [*] Real Device? Which?: XS Max
• [*] Emulator/Simulator? Which?: nevertheless, on simulator all works as expected
• Version of barcode_scan 3.0.0/3.0.1
• Output of flutter --version:

Flutter 1.20.4 • channel stable • https://github.com/flutter/flutter.git
Framework • revision fba99f6cf9 (3 days ago) • 2020-09-14 15:32:52 -0700
Engine • revision d1bc06f032
Tools • Dart 2.9.2

Additional context
Add any other context about the problem here.

[devtronic]

Maybe we can fix the problem by migrating to pigeon (#281)