Update deps: simple-workflow >= 0.1.46 (fix event timestamps in tests)

Author: Greg Leclercq

setup.py

@@ -81,7 +81,7 @@ def read(fname):
     package_dir={'simpleflow': 'simpleflow'},
     include_package_data=True,
     install_requires=[
-        'simple-workflow>=0.1.45',
+        'simple-workflow>=0.1.46',
     ],
     license=read("LICENSE"),
     zip_safe=False,