Update docs dependencies

Author: mdmintz

docs/requirements.txt

@@ -4,10 +4,11 @@ livereload==2.6.3;python_version>="3.6"
 joblib==1.0.1;python_version>="3.6"
 Markdown==3.3.3
 Jinja2==2.11.3
-readme-renderer==28.0
+readme-renderer==29.0
 pymdown-extensions==8.1.1
+lunr==0.5.8
 mkdocs==1.1.2
-mkdocs-material==6.2.8
+mkdocs-material==7.0.0
 mkdocs-simple-hooks==0.1.2
 mkdocs-material-extensions==1.0.1
 mkdocs-minify-plugin==0.4.0