Responsive graph merge (#92)

Add prop to enable responsive resize of the cytoscape graph
Add compensation to handle changing unconstrained dimension during constrained zoom
Improve function and variable names
Reset viewport dimensions on toggle on
Add responsive graph demo
Add responsive graph demo to tests
Pull data for responsive graph demo from cytoscapejs rather than local
Lint responsive graph code
Updated CHANGELOG.md
Update README for responsive feature
Moved cytoscape responsive file to avoid docgen error
Fix formatting errors
Build
Reacquire initial positions and add y offset
Remove package-lock.json

About

## Description of changes

[ ] The project was correctly built with npm run build:all.
[ ] If there was any conflict, it was solved correctly
[ ] All changes were documented in CHANGELOG.md.
[ ] All tests on CircleCI have passed.
[ ] All Percy visual changes have been approved.
[ ] Two people have :dancer:'d the pull request. You can be one of these people if you are a Dash Cytoscape core contributor.

Closes #[issue number]