Use PyPI published version of mkdocs-codeinclude-plugin

Author: rnorth

requirements.txt

@@ -1,5 +1,5 @@
 mkdocs==1.0.4
--e git+https://github.com/rnorth/mkdocs-codeinclude-plugin#egg=mkdocs_codeinclude_plugin
+mkdocs-codeinclude-plugin==0.0.1
 mkdocs-material==4.6.0
 mkdocs-markdownextradata-plugin==0.1.1
 markdown>=3.1,<3.2