When you integrate Cordova 6.1.0 on PGBuild?
It is typically about 2-3 weeks after the release. You can expect a blog post at PhoneGap Build to announce it.
Also, PGB generally follows the phonegap-cli releases, which don't necessarily coincide with cordova-cli releases. As you can see, 6.1.0 hasn't been tagged on the PhoneGap CLI project.
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