Merge pull request #557 from smartdevicelink/bugfix/dependency-install-failures

Update package.json to be compatible with more versions of Node

Author: crokita

lib/js/src/manager/screen/_VoiceCommandManagerBase.js

@@ -152,7 +152,7 @@ class _VoiceCommandManagerBase extends _SubManagerBase {
      * @returns {Boolean} - indicate whether all voice commands are unique
      */
     _arePendingVoiceCommandsUnique (voiceCommands) {
-        const allVoiceCommands = voiceCommands.map(voiceCommand => voiceCommand.getVoiceCommands()).flat();
+        const allVoiceCommands = voiceCommands.reduce((array, voiceCommand) => array.concat(voiceCommand.getVoiceCommands()), []);
         return new Set(allVoiceCommands).size === allVoiceCommands.length;
     }