Had exactly the same problem. Solved it by doing the following: Searching for and replacing com.android.support:support-v4:+ with com.android.support:support-v4:27.1.0 in the platform/android directory.
Also I had to add the following code to the platforms/android/app/build.gradle and platforms/android/build.gradle files:
configurations.all { resolutionStrategy { force 'com.android.support:support-v4:27.1.0' }}
Edited to answer “Where is this com.android.support:support-v4:+ setting ?” …
The setting will probably(in this case) be in one of your plugin’s .gradle file in the platform/android/ directory, for example in my case it was the starter-barcodescanner plugin so just go through all your plugins .gradle files :

Double check the platforms/android/build.gradle file.
Hope this helps.