bump version to 4.8.0

Author: aflanagan

setup.py

@@ -5,7 +5,7 @@
 
 setup(
     name='cronitor',
-    version='4.7.1',
+    version='4.8.0',
     packages=find_packages(),
     url='https://github.com/cronitorio/cronitor-python',
     license='MIT License',