Merge pull request #3937 from shreyasvinaya/v2.8.0

V2.8.0 minor fixes for release

Merge pull request #3936 from shreyasvinaya/v2.8.0

bump up deepchem version to 2.8.0

release 2.7.1

removing tensorflow install in release workflow for package update in pypi

deepchem 2.7.0 release tag (#3099)

Merge pull request #2821 from arunppsg/release

Minor Release 2.6.1

Merge pull request #2807 from arunppsg/requirements

Minor fixes

Merge pull request #2437 from deepchem/release

DeepChem 2.5.0 Release PR

Merge pull request #2352 from deepchem/release240

Bumping Version for 2.4.0 release

Merge pull request #1683 from peastman/move

DiskDataset.move() would not overwrite an existing dataset

Merge pull request #1516 from RishalAggarwal/master

Added functionality and unit tests for image shifting and addition of random noise (gaussian, salt and pepper)