Moved PyPI deploy to circleci

This PR moves the automatic PyPI deployment to CircleCI, which is better suited to it. This is impossible to actually test in CI as part of a pull request, unfortunately.

.circleci/config.yml

@@ -132,13 +132,19 @@ jobs:
       - image: python
     steps:
       - checkout
+      - run:
+          name: Install dependencies
+          command: |
+            set -ex
+            python -m pip install "setuptools>=20.2.0" "wheel"
       - run:
           name: Build tarball
-          command: python setup.py --quiet sdist --dist-dir .
+          command: python setup.py --quiet sdist --dist-dir . bdist_wheel --universal --dist-dir .
       - persist_to_workspace:
           root: .
           paths:
             - gwpy-*.tar.*
+            - gwpy-*-none-any.whl
 
   flake8:
     docker:
@@ -261,6 +267,19 @@ jobs:
     environment:
       PIP_FLAGS: " "
 
+  # -- deploy ---------------
+
+  deploy:
+    docker:
+      - image: python
+    steps:
+      - run:
+          name: Twine upload
+          command: |
+            # TWINE_USERNAME and TWINE_PASSWORD are set in repo settings
+            python -m pip install twine
+            python -m twine upload gwpy-*.tar.* gwpy-*-none-any.whl
+
 # -- workflow ---------------
 
 workflows:
@@ -328,3 +347,18 @@ workflows:
       - el7:2.7:
           requires:
             - sdist
+
+      # deploy
+      - deploy:
+          requires:
+            - conda:2.7
+            - conda:3.6
+            - conda:3.7
+            - debian:stretch:2.7
+            - debian:stretch:3.5
+            - el7:2.7
+          filters:
+            tags:
+              only: /.*/
+            branches:
+              ignore: /.*/