increment version number to 3.5.0 (#321)

Optional ML Related Packages (#295)

Supreme Court Corpus Extension (#277)

Co-authored-by: seanzhangkx8 <106214464+seanzhangkx8@users.noreply.github.com>
Co-authored-by: asungii <kim.laerdon@gmail.com>
Co-authored-by: Laerdon Kim <96972420+laerdon@users.noreply.github.com>

Pivotal Framework (#278)

Co-authored-by: seanzhangkx8 <106214464+seanzhangkx8@users.noreply.github.com>

Update Redirection Demo. (#259)

convokit version 3.0.2 (#258)

Documentation Minor Fix (#252)

Convokit 3.0 Mega Pull Request (#199)

* fix use of mutability in Coordination transformer.

* run black formatter

* fixed coordination with efficient implementation

* comments for changes

* metadata field deepcopy

* documentation and website update for V3.0

* get dataframe mutation fix

* fix get dataframe mutability

* modify 3.0 documentation

* revert get dataframe fixes

* pairer maximize pair mode fix

* backendMapper, config documentation

* goodbye to python3.7

* release date update

* remove all storage reference

* update release date

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Co-authored-by: Cristian Danescu-Niculescu-Mizil <cristiandnm@users.noreply.github.com>

Update convoKitMeta.py

Fix the error that arises when using deprecated `from collections import MutableMapping`.

update setup