update release

Author: zihaolucky

setup.py

@@ -30,7 +30,7 @@
 # This version string is semver compatible, but incompatible with pip.
 # For pip, we will remove all '-' characters from this string, and use the
 # result for pip.
-_VERSION = '1.0.0a6'
+_VERSION = '1.0.0a7'
 
 if platform.system() == 'Linux':
     sys.argv.append('--plat-name=manylinux1_x86_64')