chore: pin 'google-cloud-core' to allow 2.x versions (#66)

Author: tseaver

packages/google-cloud-dns/setup.py

@@ -28,7 +28,7 @@
 # 'Development Status :: 4 - Beta'
 # 'Development Status :: 5 - Production/Stable'
 release_status = "Development Status :: 3 - Alpha"
-dependencies = ["google-cloud-core >= 1.3.0, < 2.0dev"]
+dependencies = ["google-cloud-core >= 1.3.0, < 3.0dev"]
 extras = {}