Error: when replacing compilation with implementation in gradle (dependency)

I am upgrading my android studio from 3.0.1 to 3.1.0

But after update, when I build my project, it shows warning 2 :

1. Replace compilation with implementation (and compilation support will end at the end of 2018)

2. Replace testCompile with testImplementaion (and support for testCompile will end at the end of 2018)

So finally make these changes, but after that it shows some error :

build.gradle (module: app)

apply plugin: 'com.android.application'

android {
    compileSdkVersion 27
    defaultConfig {
        applicationId "biz.coolpage.aashish.app"
        minSdkVersion 17
        targetSdkVersion 27
        versionCode 4
        versionName "1.2.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled true
            shrinkResources true
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:design:27.1.0'
    implementation project(':library')
}

      

        
        
        
      

    

build.gradle (Project: Abc)

buildscript {
    repositories {
        jcenter()
        google()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.1.0'
    }
}

allprojects {
    repositories {
        jcenter()
        google()
        maven {
            url "https://maven.google.com"
        }
    }
}

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