Manifest merger failed : uses-sdk:minSdkVersion 19 cannot be smaller than version 22 declared in library

I encountered this bug when compiling the ionic project. I have followed the instructions on the Internet to continuously modify the project.properties under "myproject/platforms/android" and the project.properties under "myproject/platforms/android/Coedovalib".

<uses-sdk
   android:minSdkVersion="19"
   android:targetSdkVersion="29" />

But this did not take effect. When I cleared android and added android again, the same error still appeared. And, the value I changed was restored. I saw two articles about "The value of minSdkVersion cannot be changed after it is modified":I have followed the methods they said,but it looks not applied to my cordova lib version.

I want to seek your help to solve the problem which is related the following versions:

Ionic:

   Ionic CLI                     : 6.11.8 
   Ionic Framework               : @ionic/angular 5.0.4
   @angular-devkit/build-angular : 0.803.24
   @angular-devkit/schematics    : 8.1.3
   @angular/cli                  : 8.1.3
   @ionic/angular-toolkit        : 2.3.3

Cordova:

   Cordova CLI       : 10.0.0
   Cordova Platforms : android 9.0.0
   Cordova Plugins   : cordova-plugin-ionic-keyboard 2.2.0, cordova-plugin-ionic-webview 4.2.1, (and 
   19 other plugins)

Utility:

   cordova-res : 0.15.1
   native-run  : not installed

System:

   Android SDK Tools : 26.1.1 (D:\Program Files\sdk)
   NodeJS            : v12.18.0 (D:\Program Files\nodejs\node.exe)
   npm               : 6.14.4
   OS                : Windows 10

By the way, the errors are below:

Execution failed for task ':app:processDebugManifest'.
> Manifest merger failed : uses-sdk:minSdkVersion 19 cannot be smaller than version 22 declared in 
library [:CordovaLib]