Export `FORMATS` object to help in formatting

Export FORMATS object to help in formatting
Bump internal deps.

What’s Changed

Features:

• Export FORMATS object to help in formatting. Use in docs/tests. (#590) @NateRadebaugh

Infrastructure changes:

• Storybook/test updates (#595) @NateRadebaugh
• Add tests for isValidDate and dateTypeMode. (#594) @NateRadebaugh
• Updated many dev deps

Internal Dependencies:

• chore(deps): Bump @babel/core from 7.7.7 to 7.8.0 (#667) @dependabot-preview
• chore(deps): Bump date-fns from 2.8.1 to 2.9.0 (#629) @dependabot-preview