Added test for automated CTAN upload

.github/workflows/ctanvalidation.yaml

@@ -0,0 +1,40 @@
+### github action to make and publish a release
+##
+name: "CTAN upload validation"
+
+## Controls when the workflow will run
+on:
+  ## Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+## A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  validate:
+    runs-on: ubuntu-latest
+    steps:
+      # 1. checkout the repo
+      - name: "checkout"
+        uses: actions/checkout@v2
+
+      # 2. create package for testing
+      - name: "create an old tikz-trackschematic package"
+        run: ./build.sh --non-interactive --release v0.7.0
+
+      # 3. 
+      - name: CTAN submit validation
+        uses: paolobrasolin/ctan-submit-action@v1
+        with:
+          file_path: tikz-trackschematic-v0.7.0.zip
+          version: 1.1
+          action: validate
+          fields: |
+            pkg: "tikz-trackschematic"
+            summary: "A TikZ library for creating track diagrams in railways"
+            description: "This TikZ library is a toolbox of symbols geared primarily towards creating track schematic for either research or educational purposes. It provides a TikZ frontend to some of the symbols which may be needed to describe situations and layouts in railway operation. The library is divided into sublibraries: topology, trafficcontrol, vehicles, constructions, electrics, symbology, and measures."
+            license: isc
+            repository: https://github.com/railtoolkit/tikz-trackschematic
+            author: "Martin Scheidt"
+            uploader: "Martin Scheidt (via github CI)"
+            email: m.scheidt@tu-braunschweig.de
+            update: true
+            version: v0.7.0