title: All firebase libraries must be either above or below 14.0.0 (react-native-maps & react-native-firebase)
body: <p>I am trying to add react-native-maps into my react-native-firebase starter app.  I did not get the error until I tried adding react-native-maps. Below is the code after I followed their instructions exactly.  I tried changing the maps dependency to 15.0.1 and removing the duplicate play services, but that didn't fix anything.  Any help or insight is much appreciated! I've been futzing with this and searching for answers for over a week now. </p>
  
  <pre><code>dependencies {
      implementation project(':react-native-vector-icons')
      // react-native-google-signin
      implementation(project(':react-native-google-signin')) {
          exclude group: "com.google.android.gms"
      }
      implementation 'com.google.android.gms:play-services-auth:15.0.0'
  
      // react-native-fbsdk
      implementation project(':react-native-fbsdk')
  
      implementation(project(':react-native-firebase')) {
          transitive = false
      }
  
      // RNFirebase required dependencies
      implementation "com.google.firebase:firebase-core:15.0.2"
      implementation "com.google.android.gms:play-services-base:15.0.0"
  
      // RNFirebase optional dependencies
      implementation "com.google.firebase:firebase-auth:15.1.0"
      implementation "com.google.firebase:firebase-database:15.0.0"
      implementation "com.google.firebase:firebase-firestore:16.0.0"
  
      implementation fileTree(dir: "libs", include: ["*.jar"])
      implementation "com.android.support:appcompat-v7:27.0.2"
      implementation "com.facebook.react:react-native:+"  // From node_modules
  
      // react-native-maps required dependencies
      implementation(project(':react-native-maps')){
          exclude group: 'com.google.android.gms', module: 'play-services-base'
          exclude group: 'com.google.android.gms', module: 'play-services-maps'
      }
      implementation 'com.google.android.gms:play-services-base:10.0.1'
      implementation 'com.google.android.gms:play-services-maps:10.0.1'
  }
  
  // Run this once to be able to run the application with BUCK
  // puts all compile dependencies into folder libs for BUCK to use
  task copyDownloadableDepsToLibs(type: Copy) {
      from configurations.compile
      into 'libs'
  }
  
  apply plugin: 'com.google.gms.google-services'
  </code></pre>