Feat: add autopublishing

.drone.yml

@@ -7,3 +7,12 @@ steps:
     commands:
       - pip install -r requirements.txt
       - pytest --doctest-modules ./mapytex/
+  - name: Publish
+    image: plugins/pypi
+    settings:
+      username:
+        from_secret: pypi_username
+      password:
+        from_secret: pypi_password
+    when:
+      event: tag