adding jupyblog version to rendered version, fixing mistune version

setup.py

@@ -33,7 +33,7 @@ def read(*names, **kwargs):
     "jupytext",
     "parso",
     "pydantic",
-    "mistune>=2.0",
+    "mistune>=2.0,<3",
     "ploomber-core>=0.0.4",
     "nbformat",
 ]

src/jupyblog/md.py

@@ -21,6 +21,8 @@
 from jupyblog.exceptions import InvalidFrontMatter, InputPostException
 from jupyblog.utm import add_utm_to_all_urls, add_utm_to_url
 from jupyblog.ast import MarkdownAST, create_md_parser
+from jupyblog import __version__
+
 
 logger = logging.getLogger(__name__)
 
@@ -322,6 +324,9 @@ def render(self, name, *, include_source_in_footer, metadata=None):
             if date_existing:
                 metadata["date"] = date_existing
 
+        # add the jupyblog version
+        metadata["jupyblog"]["version_jupysql"] = __version__
+
         if self._footer_template:
             md_out = add_footer(
                 md_out,