Install dvipng

Author: dokempf

.github/workflows/paper.yml

@@ -21,7 +21,7 @@ jobs:
         run: pip install -r requirements.txt
 
       - name: Install LaTeX requirements for matplotlib
-        run: sudo apt update -y && sudo apt install -y build-essential texlive-latex-base texlive-latex-extra cm-super-minimal texlive-fonts-extra latexmk texlive-bibtex-extra biber texlive-lang-german
+        run: sudo apt update -y && sudo apt install -y build-essential texlive-latex-base texlive-latex-extra cm-super-minimal texlive-fonts-extra latexmk texlive-bibtex-extra biber texlive-lang-german dvipng
 
       - name: Compile paper
         run: make