$ sw_vers
ProductName:	macOS
ProductVersion:	11.2.3
BuildVersion:	20D91

$ node -v
v12.7.0

$ npm -v
6.14.5

$ cordova -v
10.0.0

$ cordova platforms
Installed platforms:
  android 9.0.0
  ios 6.2.0

$ cordova plugins
cordova-plugin-qrscanner 3.0.1 "QRScanner"  # danielzen/cordova-plugin-qrscanner の方

$ cordova plugin add cordova-plugin-qrscanner
$ cordova build ios
...
/Users/hoge/myapp/platforms/ios/Pollo/Plugins/cordova-plugin-qrscanner/QRScanner.swift:471:63: error: 'openSettingsURLString' has been renamed to 'UIApplicationOpenSettingsURLString'
            guard let settingsUrl = URL(string: UIApplication.openSettingsURLString) else {
                                                              ^~~~~~~~~~~~~~~~~~~~~
                                                              UIApplicationOpenSettingsURLString
UIKit.UIApplication:70:22: note: 'openSettingsURLString' was introduced in Swift 4.2
    public class let openSettingsURLString: String
                     ^
/Users/hoge/myapp/platforms/ios/Pollo/Plugins/cordova-plugin-qrscanner/QRScanner.swift:484:74: error: 'openSettingsURLString' has been renamed to 'UIApplicationOpenSettingsURLString'
                UIApplication.shared.openURL(NSURL(string: UIApplication.openSettingsURLString)! as URL)
                                                                         ^~~~~~~~~~~~~~~~~~~~~
                                                                         UIApplicationOpenSettingsURLString
UIKit.UIApplication:70:22: note: 'openSettingsURLString' was introduced in Swift 4.2
    public class let openSettingsURLString: String
                     ^

** BUILD FAILED **


The following build commands failed:
	CompileSwift normal x86_64 /Users/hoge/myapp/platforms/ios/Pollo/Plugins/cordova-plugin-qrscanner/QRScanner.swift
	CompileSwiftSources normal x86_64 com.apple.xcode.tools.swift.compiler
(2 failures)
xcodebuild: Command failed with exit code 65
error Command failed with exit code 65.

$ cordova plugin rm cordova-plugin-qrscanner
$ cordova plugin add https://github.com/danielzen/cordova-plugin-qrscanner#103bceff98427956f21a83222c1f699580031673

$ cordova build ios
...
** BUILD SUCCEEDED **

$ cordova build android
...
> Configure project :app
WARNING: Configuration 'compile' is obsolete and has been replaced with 'implementation' and 'api'.
It will be removed in version 5.0 of the Android Gradle plugin.
For more information, see http://d.android.com/r/tools/update-dependency-configurations.html.

> Task :app:compileReleaseJavaWithJavac FAILED
/Users/hoge/myapp/platforms/android/app/src/main/java/com/bitpay/cordova/qrscanner/QRScanner.java:27: エラー: シンボルを見つけられません
import android.support.v4.app.ActivityCompat;
                             ^
  シンボル:   クラス ActivityCompat
  場所: パッケージ android.support.v4.app
/Users/hoge/myapp/platforms/android/app/src/main/java/com/bitpay/cordova/qrscanner/QRScanner.java:356: エラー: シンボルを見つけられません
                    boolean showRationale = ActivityCompat.shouldShowRequestPermissionRationale(cordova.getActivity(), permission);
                                            ^
  シンボル:   変数 ActivityCompat
  場所: クラス QRScanner
注意:一部の入力ファイルは非推奨のAPIを使用またはオーバーライドしています。
注意:詳細は、-Xlint:deprecationオプションを指定して再コンパイルしてください。
注意:/Users/hoge/myapp/platforms/android/app/src/main/java/com/bitpay/cordova/qrscanner/QRScanner.javaの操作は、未チェックまたは安全ではありません。
注意:詳細は、-Xlint:uncheckedオプションを指定して再コンパイルしてください。
エラー2個

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:compileReleaseJavaWithJavac'.
> Compilation failed; see the compiler error output for details.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

Deprecated Gradle features were used in this build, making it incompatible with Gradle 7.0.
Use '--warning-mode all' to show the individual deprecation warnings.
See https://docs.gradle.org/6.5/userguide/command_line_interface.html#sec:command_line_warnings

BUILD FAILED in 2s
21 actionable tasks: 1 executed, 20 up-to-date
Command failed with exit code 1: /Users/hoge/myapp/platforms/android/gradlew cdvBuildRelease -b /Users/hoge/myapp/platforms/android/build.gradle
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
ERROR: "build-android-release" exited with 1.
error Command failed with exit code 1.