Peg dependency versions

Author: dismantl

server/requirements.txt

@@ -1,10 +1,10 @@
-Flask >= 1.0.2
-Flask-SQLAlchemy >= 2.3.2
-Flask-GraphQL >= 2.0.0
-sqlalchemy >= 1.2.6
-python-dotenv >= 0.7.1
-flask-restx >= 0.2.0
-graphene >= 2.0
-flask-accepts >= 0.12.1
-marshmallow >= 3.0.4
-boto3 >= 1.18.13
+Flask == 2.0.2
+Flask-SQLAlchemy == 2.5.1
+Flask-GraphQL == 2.0.1
+sqlalchemy == 1.4.26
+python-dotenv == 0.19.1
+flask-restx == 0.5.1
+graphene == 2.1.9
+flask-accepts == 0.18.4
+marshmallow == 3.14.0
+boto3 == 1.18.13