Make the boto3 requirement even less restrictive (#72)

* Be less strict about required boto3 and sqlalchemy versions

* Allow latest more-itertools

* Make the boto3 requirement even less restrictive

Author: ZacharySpector

setup.cfg

@@ -26,7 +26,7 @@ setup_requires =
     pytest-runner
     setuptools-scm
 install_requires =
-    boto3 >=1.12.7,<1.14
+    boto3 >=1.12.7,<2
     SQLAlchemy >=1.3.13,<1.4
     pydantic == 1.4
     more-itertools >= 8.0.2,<8.5