Added missing boto3 dependency for gempyor, GH-238

flepimop/gempyor_pkg/setup.cfg

@@ -35,6 +35,7 @@ install_requires =
     dask
     scipy
     graphviz
+    boto3
 
 # see https://stackoverflow.com/questions/58826164/dependencies-requirements-for-setting-up-testing-and-installing-a-python-lib
 # installed for pip install -e ".[test]"