Add inkscape dependency

Author: Daltz333

readthedocs.yml

@@ -18,6 +18,16 @@ build:
   tools:
     nodejs: "16"
 
+# Set the version of Python and other tools you might need
+build:
+  os: ubuntu-20.04
+  tools:
+    python: "3.8"
+    # You can also specify other tool versions:
+    nodejs: "16"
+  apt_packages:
+    - inkscape
+
 python:
   install:
   - requirements: source/requirements.txt