Merge branch 'master' into develop

CI from GitHub workflows must be performed in 'master' branch, even
though the work most directly affected the 'develop' branch.

.github/workflows/Documentation.yml

@@ -0,0 +1,27 @@
+name: Documentation
+
+on:
+  push:
+    branches:
+    - main
+    - develop
+  pull_request:
+    branches:
+    - master
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: julia-actions/setup-julia@latest
+        with:
+          version: '1.5'
+      - name: Install dependencies
+        run: julia --project=docs/ -e 'using Pkg; Pkg.develop(PackageSpec(path=pwd())); Pkg.instantiate()'
+      - name: Build and deploy
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: julia --project=docs/ docs/make.jl
+