Use pip-tools.

Fixes #379

requirements-dev.txt

@@ -8,6 +8,7 @@ honcho
 httpie
 hupper
 mypy
+pip-tools
 pre_commit
 psycopg2
 watchdog

requirements.in

@@ -0,0 +1,17 @@
+beautifulsoup4==4.6.3
+boto3==1.7.48
+celery==4.2.1
+Django==2.0.9
+django-anymail==3.0
+django-localflavor==2.0
+django-storages==1.6.6
+django-waffle==0.15.1
+google-api-python-client==1.6.4
+# google-auth-httplib2 has an adapter to make google-auth creds work
+# with the Python client.
+google-auth-httplib2==0.0.3
+google-auth-oauthlib==0.2.0
+requests==2.9.1
+rollbar==0.14.0
+stripe==2.11.0
+wal-e[aws]==1.0.3

requirements.txt

@@ -1,17 +1,45 @@
+#
+# This file is autogenerated by pip-compile
+# To update, run:
+#
+#    pip-compile requirements.in
+#
+amqp==2.4.2               # via kombu
 beautifulsoup4==4.6.3
+billiard==3.5.0.5         # via celery
 boto3==1.7.48
+boto==2.49.0              # via wal-e
+botocore==1.10.84         # via boto3, s3transfer
+cachetools==3.1.0         # via google-auth
 celery==4.2.1
-Django==2.0.9
 django-anymail==3.0
 django-localflavor==2.0
 django-storages==1.6.6
 django-waffle==0.15.1
+django==2.0.9
+docutils==0.14            # via botocore
+gevent==1.4.0             # via wal-e
 google-api-python-client==1.6.4
-# google-auth-httplib2 has an adapter to make google-auth creds work
-# with the Python client.
 google-auth-httplib2==0.0.3
 google-auth-oauthlib==0.2.0
+google-auth==1.6.3        # via google-auth-httplib2, google-auth-oauthlib
+greenlet==0.4.15          # via gevent
+httplib2==0.12.1          # via google-api-python-client, google-auth-httplib2, oauth2client
+jmespath==0.9.4           # via boto3, botocore
+kombu==4.5.0              # via celery
+oauth2client==4.1.3       # via google-api-python-client
+oauthlib==3.0.1           # via requests-oauthlib
+pyasn1-modules==0.2.4     # via google-auth, oauth2client
+pyasn1==0.4.5             # via oauth2client, pyasn1-modules, rsa
+python-dateutil==2.8.0    # via botocore
+pytz==2019.1              # via celery, django
+requests-oauthlib==1.2.0  # via google-auth-oauthlib
 requests==2.9.1
 rollbar==0.14.0
+rsa==4.0                  # via google-auth, oauth2client
+s3transfer==0.1.13        # via boto3
+six==1.12.0               # via django-anymail, google-api-python-client, google-auth, oauth2client, python-dateutil, rollbar
 stripe==2.11.0
+uritemplate==3.0.0        # via google-api-python-client
+vine==1.3.0               # via amqp
 wal-e[aws]==1.0.3