This might mean the storybook requires a manual install of node-sass, but that’s better than the alternative

[New] `DayPickerSingleDateController`: add `allowUnselect` prop that allows controlling whether unselecting selected days is possible

[Docs] examples: `DateRangePickerWrapper`/`SingleDatePickerWrapper`: Add open direction as default props

Fixes #1394.

Co-authored-by: Lee Mulvey <lmulvey@me.com>
Co-authored-by: Jonathan Hao <haojonat@amazon.com>

Fixes #1507. Fixes #1537.

[Dev Deps] update `@babel/cli`, `@babel/core`, `@babel/register`, `@babel/runtime`, `@storybook/addon-actions`, `@storybook/addon-info`, `@storybook/addon-links`, `@storybook/addon-options`, `@storybook/addons`, `@storybook/react`, `@welldone-software/why-did-you-render`, `airbnb-js-shim`, `aphrodite`, `babel-eslint`, `babel-loader`, `babel-plugin-inline-react-svg`, `babel-plugin-inline-svg`, `babel-preset-airbnb`, `clean-css`, `coveralls`, `cross-env`, `enzyme`, `enzyme-adapter-react-helper`, `eslint`, `eslint-config-airbnb`, `eslint-plugin-import`, `eslint-plugin-jsx-a11y`, `eslint-plugin-react`, `eslint-plugin-react-hooks`, `eslint-plugin-react-with-styles`, `in-publish`, `react-with-styles-interface-aphrodite`, `rimraf`, `safe-publish-latest`, `sass-loader`, `sinon`, `sinon-sandbox`, `webpack`

Fixes #1592.

Fixes #2034. Fixes #2050.

Fixes #1513.

[Deps] update `airbnb-prop-types`, `enzyme-shallow-equal`, `object.assign`, `object.values`, `react-moment-proptypes`, `react-outside-click-handler`, `react-portal`

Fixes #1993

Fixes #1861.

Update docs with an alternative installer command

Since the primarily recommended command doesn't work on Windows,
@ljharb provided a `npx` command that is platform-agnostic for
contributors running npm 5+

Also made it more clear that the "primarily recommended command" should
be run from the command line.

Co-authored-by: mmarkelov <maks-markel@mail.ru>
Co-authored-by: Stephen <stephencweiss@gmail.com>

Fixes #1632. Closes #1727.

Prevent vertical scrollable prev nav button from overlapping weekday headers

Add option to allow days violating min nights to be clicked

Adding test for #1911

Fixing render conditional in DayPickerKeyboardShortcuts