Lock in to databases v0.3.2 for now

which uses the simpler to install psycopg2-binary.

Pipfile

@@ -21,7 +21,7 @@ pycurl = "==7.43.0.5"
 # web service dependencies
 authlib = "*"
 cryptography = "*"
-databases = {extras=["postgresql", "sqlite"], version = "*"}
+databases = {extras=["postgresql", "sqlite"], version = "0.3.2"}
 fastapi = "*"
 gunicorn = "*"
 httpx = "==0.11.1"