Added auto-release infrastructure

Author: astrofrog

.github/release.yml

@@ -0,0 +1,21 @@
+changelog:
+  exclude:
+    authors:
+      - pre-commit-ci
+    labels:
+      - no-changelog-entry-needed
+      - skip-changelog
+
+  categories:
+    - title: New Features
+      labels:
+        - enhancement
+    - title: Bug Fixes
+      labels:
+        - bug
+    - title: Documentation
+      labels:
+        - documentation
+    - title: Other Changes
+      labels:
+        - "*"

.github/workflows/update-changelog.yaml

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+# This workflow takes the GitHub release notes and updates the changelog on the
+# main branch with the body of the release notes, thereby keeping a log in
+# the git repo of the changes.
+
+name: "Update Changelog"
+
+on:
+  release:
+    types: [released]
+
+jobs:
+  update:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+        with:
+          ref: main
+
+      - name: Update Changelog
+        uses: stefanzweifel/changelog-updater-action@v1
+        with:
+          release-notes: ${{ github.event.release.body }}
+          latest-version: ${{ github.event.release.name }}
+          path-to-changelog: CHANGES.md
+
+      - name: Commit updated Changelog
+        uses: stefanzweifel/git-auto-commit-action@v4
+        with:
+          branch: main
+          commit_message: Update CHANGELOG
+          file_pattern: CHANGES.md

CHANGES.md

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+# 0.7 (2020-08-03)
+
+-   Fix compatibility with Matplotlib 3.3. \[#30\]
+-   Drop support for Python 2.7 and require Matplotlib\>=3. \[#30\]
+-   Update package infrastructure. \[#31\]
+
+# 0.6 (2019-05-28)
+
+-   Avoid unecessary imports of Qt and Tk. \[#27\]
+
+# 0.5 (2019-01-27)
+
+-   Internal code reorganization to faciliate re-use in other packages.
+    \[#26\]
+
+# 0.4 (2018-09-04)
+
+-   Added a keyword argment `update_while_panning` to set whether to
+    compute the scatter denstiy map while panning and zooming. \[#16\]
+-   Downsample when resizing interactive window. \[#14\]
+
+# 0.3 (2017-10-29)
+
+-   Added support for the `c=` argument, similar to the argument with
+    the same name in Matplotlib\'s `scatter` function. \[#11\]
+-   Added support for log axes. \[#11\]
+-   Fixed support for flipped limits (e.g. xmax \< xmin). \[#11\]
+-   Added support for setting vmin/vmax to functions to determine limits
+    on-the-fly. \[#11\]
+
+# 0.2 (2017-07-20)
+
+-   Fix compatibility with the Jupyter notebook. \[#8\]
+
+# 0.1 (2017-07-19)
+
+-   Initial version.