Remove Hydrogen isotopes in deprotonating

[Ruibin-Liu]

Hydrogen isotopes should also be removed. Also, the documentation was old/wrong and now it is updated.

Reference Issues/PRs

NA

What does this implement/fix? Explain your changes

Removing H atoms by element_symbol == "H" doesn't remove isotopes D or T.
Simply adding D and T to the list should work.

What testing did you do to verify the changes in this PR?

NA

Pull Request Checklist

• Added a note about the modification or contribution to the ./CHANGELOG.md file (if applicable)
• Added appropriate unit test functions in the ./graphein/tests/* directories (if applicable)
• Modify documentation in the corresponding Jupyter Notebook under ./notebooks/ (if applicable)
• Ran python -m py.test tests/ and make sure that all unit tests pass (for small modifications, it might be sufficient to only run the specific test file, e.g., python -m py.test tests/protein/test_graphs.py)
• Checked for style issues by running black . and isort .

[Ruibin-Liu]

What kinds of tests should I add?

[sonarcloud]

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[a-r-j]

Thanks @Ruibin-Liu ! I think the tests you've added seem sufficient to me; anything you're unhappy with?

[Ruibin-Liu]

Thanks @Ruibin-Liu ! I think the tests you've added seem sufficient to me; anything you're unhappy with?

I think it's good to go, but I am not sure why some checks failed.

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[a-r-j]

Thanks @Ruibin-Liu ! I think the tests you've added seem sufficient to me; anything you're unhappy with?

I think it's good to go, but I am not sure why some checks failed.

Looks like there was some dependency drift. If you sync up to master I expect these tests will pass :)

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication