Ssi4onnx

- Retention of metadata_props

What's Changed
* Retention of metadata_props by PINTO0309 in https://github.com/PINTO0309/ssi4onnx/pull/2


**Full Changelog**: https://github.com/PINTO0309/ssi4onnx/compare/1.0.3...1.0.4

1. Fix to preserve `domain` and `ir_version`.
2. API specification changes due to the version upgrade of onnx are now supported. `onnx==1.16.0`

What's Changed
* Fix to preserve domain and ir_version by PINTO0309 in https://github.com/PINTO0309/ssi4onnx/pull/1

New Contributors
* PINTO0309 made their first contribution in https://github.com/PINTO0309/ssi4onnx/pull/1

**Full Changelog**: https://github.com/PINTO0309/ssi4onnx/compare/1.0.2...1.0.3

- Add short form

$ ssi4onnx -h

usage:
ssi4onnx [-h]
-if INPUT_ONNX_FILE_PATH
[-of OUTPUT_ONNX_FILE_PATH]
[-n]

optional arguments:
-h, --help
show this help message and exit.

-if INPUT_ONNX_FILE_PATH, --input_onnx_file_path INPUT_ONNX_FILE_PATH
Input onnx file path.

-of OUTPUT_ONNX_FILE_PATH, --output_onnx_file_path OUTPUT_ONNX_FILE_PATH
Output onnx file path.

-n, --non_verbose
Do not show all information logs. Only error logs are displayed.

- Security update
- README update

- Initial release