Updated docker file to use python 3.12x, and therefore fixed python c… (#357)

Author: JessicaTegner

Dockerfile

@@ -7,9 +7,9 @@
 # --------------------------------------------------------------------------
 
 # Use Python 3.9
-FROM  python:3.9
+FROM  python:3.12
 # Not sure if this line needs updating, I think this person no longer works on the project?
-LABEL author  Marc Abramowitz <marc@marc-abramowitz.com>
+LABEL author  Jessica Tegner <jessica@jessicategner.com> and pypandoc contributors
 # Update apt packages and install pandoc
 RUN apt update && apt upgrade -y && apt install pandoc -y
 # Update pip

pyproject.toml

@@ -33,7 +33,7 @@ packages = [
 ]
 
 [tool.poetry.dependencies]
-python = ">=3.7,<=3.12"
+python = ">=3.7,<3.13"
 
 [tool.poetry.dev-dependencies]
 pandocfilters = "^1.5"