Update dev instructions and deprecated markdown_extension

Author: flokoe

README.md

@@ -9,7 +9,9 @@ This repo tries to preserve and present all this valuable information in a moder
 To edit and develop locally install the following packages and run the built in dev webserver:
 
 ```bash
-pip install mkdocs-material mkdocs-git-revision-date-localized-plugin
+python3 -m venv env
+pip install mkdocs-material mkdocs-git-revision-date-localized-plugin mkdocs-awesome-pages-plugin mkdocs-minify-plugin
+source env/bin/activate
 mkdocs serve
 ```
 

mkdocs.yml

@@ -40,8 +40,8 @@ plugins:
 markdown_extensions:
   - admonition
   - pymdownx.emoji:
-      emoji_index: !!python/name:materialx.emoji.twemoji
-      emoji_generator: !!python/name:materialx.emoji.to_svg
+      emoji_index: !!python/name:material.extensions.emoji.twemoji
+      emoji_generator: !!python/name:material.extensions.emoji.to_svg
   - pymdownx.highlight:
       anchor_linenums: true
   - pymdownx.superfences