问错误：“未解决的引用: versionCode”在build.gradle.kts中

EN

org.gradle.internal.exceptions.LocationAwareException: Build file ' ... /build.gradle.kts' line: 13
Script compilation errors:

  Line 13:         versionCode = 1
                   ^ Unresolved reference: versionCode

  Line 14:         versionName = "1.0"
                   ^ Unresolved reference: versionName

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Caused by: ScriptCompilationException( ... )

plugins {
    id("com.android.library")
    id("kotlin-android")
}

android {
    compileSdk = 30
    buildToolsVersion = "30.0.3"

    defaultConfig {
        minSdk = 21
        targetSdk = 30
        versionCode = 1       //error: Unresolved reference
        versionName = "1.0"   //error: Unresolved reference

        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
        consumerProguardFiles("consumer-rules.pro")
    }

    buildTypes {
        release {
            isMinifyEnabled = false
            proguardFiles(
                getDefaultProguardFile("proguard-android-optimize.txt"),
                "proguard-rules.pro"
            )
        }
    }
    compileOptions {
        sourceCompatibility = JavaVersion.VERSION_1_8
        targetCompatibility = JavaVersion.VERSION_1_8
    }
    kotlinOptions {
        jvmTarget = "1.8"
    }
}