runge kutta methods updated. bogacki_shampine, a 3rd order method added.

[Ziaeemehr]

Describe your change:

I adde bogacki shampine algorithm (3rd order) to solve ordinary differential equations, I also modified runge kurta 4th order method to a standard shape to solve one step integration and independet from intial and end simulation time.

docstring test added to each algorithm.

• [X] Add an algorithm?
• [ ] Fix a bug or typo in an existing algorithm?
• [ ] Documentation change?

Checklist:

• [X] I have read CONTRIBUTING.md.
• [X] This pull request is all my own work -- I have not plagiarized.
• [X] I know that pull requests will not be merged if they fail the automated tests.
• [X] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms.
• [X] All new Python files are placed inside an existing directory.
• [X] All filenames are in all lowercase characters with no spaces or dashes.
• [X] All functions and variable names follow Python naming conventions.
• [X] All function parameters and return values are annotated with Python type hints.
• [X] All functions have doctests that pass the automated testing.
• [X] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation.
• [X] If this pull request resolves one or more open issues then the commit message contains Fixes: #{$ISSUE_NO}.

[Erfaniaa]

@chttrjeankr @infrontoftheforest Do you think this is implemented correctly?

[stale[bot]]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[cclauss]

v