Simply invoke the tox 'release' environment to cut releases.

.travis.yml

@@ -24,25 +24,11 @@ jobs:
   - <<: *latest_py3
     env: TOXENV=docs DISABLE_COVERAGE=1
   - <<: *latest_py3
-    stage: deploy (to PyPI for tagged commits)
+    stage: deploy
     if: tag IS present
     install: skip
-    script: skip
-    after_success: true
-    before_deploy:
-      - python bootstrap.py
-      - "! grep pyc setuptools.egg-info/SOURCES.txt"
-    deploy:
-      provider: pypi
-      on:
-        tags: true
-        all_branches: true
-      user: __token__
-      password:
-        secure: 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
-      distributions: release
-      skip_cleanup: true
-      skip_upload_docs: true
+    script: tox -e release
+    after_success: skip
 
 cache: pip