Apply updates from cookiecutter

This automated commit applies the latest updates from our cookiecutters [1] to
this repo.

[1]: https://github.com/hypothesis/cookiecutters

Makefile

@@ -15,7 +15,7 @@ $(call help,make db,initialize the DB and upgrade it to the latest migration)
 db: args?=upgrade head
 db: python
 	@tox -qe dev --run-command 'python3 -m test_pyramid_app.scripts.init_db --create --stamp'
-	@tox -qe dev --run-command 'alembic $(args)'
+	@PYTHONPATH=$(CURDIR) TOX_TESTENV_PASSENV=PYTHONPATH tox -qe dev --run-command 'alembic $(args)'
 
 .PHONY: devdata
 $(call help,make devdata,load development data and environment variables)

tox.ini

@@ -30,6 +30,7 @@ setenv =
 passenv =
     HOME
     PYTEST_ADDOPTS
+    PYTHONPATH
     dev: DEBUG
     dev: SENTRY_DSN
     dev: NEW_RELIC_LICENSE_KEY