Add checks for new Dask versions on Conda Forge

.github/workflows/watch-conda-forge.yml

@@ -0,0 +1,38 @@
+name: Check for new versions of Dask on Conda Forge
+
+on:
+  schedule:
+  - cron: "0 * * * *"
+
+jobs:
+  check-version:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v1
+    - name: Get latest Dask version
+      id: latest_version
+      uses: jacobtomlinson/gha-anaconda-package-version@0.1.0
+      with:
+        org: 'conda-forge'
+        package: 'dask'
+    - name: Find and Replace
+      uses: jacobtomlinson/gha-find-replace@0.1.1
+      with:
+        include: "(base\/|notebook\/)"
+        find: "dask==[0-9\.]+"
+        replace: "${{ steps.latest_tag.outputs.version }}"
+    - name: Create Pull Request
+      uses: peter-evans/create-pull-request@v1
+      with:
+        token: ${{ secrets.GITHUB_TOKEN }}
+        commit-message: 'Update Dask version to ${{ steps.latest_tag.outputs.version }}'
+        title: 'Update Dask version to ${{ steps.latest_tag.outputs.version }}'
+        reviewers: 'jacobtomlinson'
+        branch: 'upgrade-dask-version'
+        branch-suffix: 'none'
+        body: |
+          A new Dask version has been detected. 
+          
+          Updated `Dockerfile`s to use `${{ steps.latest_tag.outputs.version }}`.