Allow recent more-itertools version (#67)

* Be less strict about required boto3 and sqlalchemy versions

* Allow latest more-itertools

Author: ZacharySpector

setup.cfg

@@ -29,7 +29,7 @@ install_requires =
     boto3 >=1.12.7,<1.14
     SQLAlchemy >=1.3.13,<1.4
     pydantic == 1.4
-    more-itertools == 8.0.2
+    more-itertools >= 8.0.2,<8.5
 
 tests_require =
     pytest