- Added support for custom argv: `args.parse_args(..., argv = ['--string', 'text', '--int', '42'])`
- WriteOnceDict class now subclasses MutableMapping and dict, enabling `wandb.config.update(args)`, and adding support for `iter()`, `len()`.
- Removed support for dot writing: `args.key = val` no longer supported. This is a bad idea anyway. The implementation of this in v1.0.0 has bugs and is not recommended.