Update pydantic to ^1.8 (#82)

Author: creatorrr

setup.cfg

@@ -28,7 +28,7 @@ setup_requires =
 install_requires =
     boto3 >=1.12.7,<2
     SQLAlchemy >=1.3.13,<1.4
-    pydantic == 1.4
+    pydantic >=1.8,<1.9
     more-itertools >= 8.0.2,<8.5
 
 tests_require =