chore: release v1.7.0 (#380)


diff --git a/setup.py b/setup.py
index d303cb3..42cf4fb 100644
--- a/setup.py
+++ b/setup.py
@@ -30,9 +30,11 @@
 with io.open("README.rst", "r") as fh:
     long_description = fh.read()
 
+version = "1.7.0"
+
 setup(
     name="google-auth",
-    version="1.6.3",
+    version=version,
     author="Google Cloud Platform",
     author_email="[email protected]",
     description="Google Authentication Library",