Bump to version 0.6.0

Strilanc · Strilanc · commit d58c342125fb · 2019-10-30T13:53:31.000-07:00
diff --git a/cirq/_version.py b/cirq/_version.py
@@ -28,4 +28,4 @@
         'B) Explicitly install an older deprecated-but-compatible version '
         'of cirq (e.g. "python -m pip install cirq==0.5.*")')
 
-__version__ = "0.6.0.dev"
+__version__ = "0.6.0"
