用gradle thrivecom.ringcaptcha导入的故事

Question

我试图导入一个名为ringcaptcha的sdk，不幸的是我跟踪了他们的文档但没有取得多大成功。我在build.gradle文件中有以下语句：

    repositories {
    maven { url 'http://ringcaptcha.github.io/ringcaptcha-android'}
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:23.3.0'
    compile 'com.android.support:recyclerview-v7:23.3.0'
    compile 'com.android.support:design:23.3.0'
    compile 'com.android.support:cardview-v7:23.3.0'
    compile 'com.android.support:percent:23.3.0'
    compile 'com.google.android.gms:play-services-maps:6.5.87'
    compile 'com.jakewharton:butterknife:7.0.1'
    compile 'com.squareup.retrofit2:retrofit:2.0.2'
    compile 'com.squareup.okhttp3:logging-interceptor:3.2.0'
    compile 'com.jakewharton:butterknife:7.0.1'
    compile 'com.squareup.retrofit2:converter-gson:2.0.0'
    compile 'com.thrivecom:ringcaptcha:1.0.8@aar' // SMS service
}

我无法解决com.thrivecom.ringcaptcha：1.0.8？