Upgrades dependencies to their latest allowed versions

Pipfile

@@ -51,7 +51,7 @@ channels = "~=3.0"
 channels-redis = "*"
 uvicorn = {extras = ["standard"], version = "*"}
 concurrent-log-handler = "*"
-"pdfminer.six" = "*"
+
 pyzbar = "*"
 mysqlclient = "*"
 celery = {extras = ["redis"], version = "*"}
@@ -66,9 +66,10 @@ zxing-cpp = {version = "*", platform_machine = "== 'x86_64'"}
 #
 # Pin this until piwheels is building 1.9 (see https://www.piwheels.org/project/scipy/)
 scipy = "==1.8.1"
+# v4 brings in extra dependencies for features not used here
+reportlab = "==3.6.12"
 
 [dev-packages]
-coveralls = "*"
 factory-boy = "*"
 pytest = "*"
 pytest-cov = "*"
@@ -76,6 +77,7 @@ pytest-django = "*"
 pytest-env = "*"
 pytest-sugar = "*"
 pytest-xdist = "*"
+"pdfminer.six" = "*"
 black = "*"
 pre-commit = "*"
 imagehash = "*"