bin_to_octal (#2431)

* bin_to_octal

Converts binary values to the octal equivalent.

* Update bin_to_octal

* Update conversions/bin_to_octal

Co-authored-by: Christian Clauss <cclauss@me.com>

* Update conversions/bin_to_octal

Co-authored-by: Du Yuanchao <shellhub.me@gmail.com>

* Update conversions/bin_to_octal

Co-authored-by: Du Yuanchao <shellhub.me@gmail.com>

* Update conversions/bin_to_octal

Co-authored-by: Du Yuanchao <shellhub.me@gmail.com>

* Rename bin_to_octal to bin_to_octal.py

Co-authored-by: Christian Clauss <cclauss@me.com>
Co-authored-by: Du Yuanchao <shellhub.me@gmail.com>