Merge branch 'dynamic-loading-3.9' into 3.8

Author: freakboy3742

.gitignore

@@ -1,14 +1,17 @@
 *.swo
 *.swp
-src/*
+.envrc
+.vscode/
 archive/*
 build/*
-downloads/*
 diff/*
 dist/*
-.envrc
-.vscode/
+downloads/*
+install/*
 local/*
+merge/*
+src/*
+support/*
 *.dist-info
 __pycache__
 tests/testbed/macOS