Update master to 0.8.0.dev (#2686)

dstrain115 · web-flow · commit cc61838b155a · 2020-01-17T15:19:56.000-08:00
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__ = "0.7.0.dev"
+__version__ = "0.8.0.dev"
