Issue with Kotlin Gradle version

Question

Good morning, I am developing an app with flutter and the application uses a dependency called barcode_scan that serves to scan QR code, when generating the APK Gradle an error with the version. That is the mistake:

* What went wrong:
The Android Gradle plugin supports only Kotlin Gradle plugin version 1.3.10 and higher.
The following dependencies do not satisfy the required version:
project ':barcode_scan' -> org.jetbrains.kotlin:kotlin-gradle-plugin:1.2.51

This is the code of Gradle:

buildscript {
    ext.kotlin_version = '1.3.50'
    repositories {
        google()
        jcenter()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.5.0'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}

allprojects {
    repositories {
        google()
        jcenter()
    }
}

rootProject.buildDir = '../build'
subprojects {
    project.buildDir = "${rootProject.buildDir}/${project.name}"
}
subprojects {
    project.evaluationDependsOn(':app')
}

task clean(type: Delete) {
    delete rootProject.buildDir
}