add latex pacakges to fix matplotlib compat

Author: mmcky

.github/workflows/ci.yml

@@ -25,7 +25,9 @@ jobs:
             texlive-fonts-extra       \
             texlive-xetex             \
             latexmk                   \
-            xindy
+            xindy                     \
+            dvipng                    \
+            cm-super
       - name: Display Conda Environment Versions
         shell: bash -l {0}
         run: conda list