Partial removal of lodash from charts, docs, selectable and datepicker components

[anishagg17]

Summary

Makes progress on #360

Checklist

- [ ] Check against all themes for compatibility in both light and dark modes
- [ ] Checked in mobile
- [ ] Checked in IE11 and Firefox
- [ ] Props have proper autodocs
- [ ] Added documentation examples
- [ ] Added or updated jest tests

• Checked for breaking changes and labeled appropriately
  - [ ] Checked for accessibility including keyboard-only and screenreader modes
• A changelog entry exists and is marked appropriately

[kibanamachine]

Since this is a community submitted pull request, a Jenkins build has not been kicked off automatically. Can an Elastic organization member please verify the contents of this patch and then kick off a build manually?

[cchaos]

Jenkins, test this

[kibanamachine]

Preview documentation changes for this PR: https://eui.elastic.co/pr_3053/

[chandlerprall]

Thanks for starting to dig into these!

For future changes, any dependencies on lodash inside test files can remain. We're mainly interested in removing it as a runtime dependency.

[anishagg17]

I have made the necessary changes

[anishagg17]

I have restored it and will remove it some other day

[chandlerprall]

I have restored it and will remove it some other day

Also failing from the 3 other react-datepicker modifications,

• packages/react-datepicker/test/month_dropdown_test.js
• packages/react-datepicker/test/month_test.js
• packages/react-datepicker/test/year_dropdown_test.js

[anishagg17]

Finally, I resolved them at the right place

[anishagg17]

I have replaced it with (end - start + step - 1)/step as an alternative to Math.ceil method as I tested first one works as expected

[chandlerprall]

Changes LGTM; pulled & tested locally, including react-datepicker tests & docs

[chandlerprall]

jenkins test this

[kibanamachine]

Preview documentation changes for this PR: https://eui.elastic.co/pr_3053/