title: I can't tune up material drawer 6.0.2 in android studio 3.0.1
body: <p>I can't tune up material drawer 6.0.2 from <a href="https://github.com/mikepenz/MaterialDrawer" rel="nofollow noreferrer">https://github.com/mikepenz/MaterialDrawer</a></p>
  
  <p>Build.gradle</p>
  
  <pre><code>apply plugin: 'com.android.application'
  
  android {
      compileSdkVersion 26
      defaultConfig {
          applicationId "com.vlado.navigationsandfragments"
          minSdkVersion 15
          targetSdkVersion 26
          versionCode 1
          versionName "1.0"
          testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
      }
      buildTypes {
          release {
              minifyEnabled false
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
          }
      }
      compileOptions {
          targetCompatibility 1.8
          sourceCompatibility 1.8
      }
  }
  
  dependencies {
      implementation fileTree(dir: 'libs', include: ['*.jar'])
      implementation 'com.android.support:appcompat-v7:26.1.0'
      implementation 'com.android.support.constraint:constraint-layout:1.0.2'
      testImplementation 'junit:junit:4.12'
      androidTestImplementation 'com.android.support.test:runner:1.0.1'
      androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
  
      implementation("com.mikepenz:materialdrawer:6.0.2@aar") {
          transitive = true
      }
  
      //required support lib modules
      implementation "com.android.support:appcompat-v7:${versions.supportLib}"
      implementation "com.android.support:recyclerview-v7:${versions.supportLib}"
      implementation "com.android.support:support-annotations:${versions.supportLib}"
      implementation "com.android.support:design:${versions.supportLib}"
  }
  </code></pre>
  
  <p>Exception:Error:(38, 0) Could not get unknown property 'versions' for object of type org.gradle.api.internal.artifacts.dsl.dependencies.DefaultDependencyHandler</p>
  
  <p>I think the problem is in "required support lib modules" ,but if I delete them , the application have no error and doesn't work.</p>