@material-ui/system 4.9.6 on Node.js NPM

Big thanks to the 39 contributors who made this release possible.

Here are some highlights ✨:

⚛️ Improve the DX in Visual Studio Code (#20079, #19962, #19280) @eps1lon @jedwards1211.
- Preview the purpose of each theme.spacing arguments right in the editor:
- Leverage code snippets to save time with this extension.
- Preview the colors right in the editor:
🔍 12 patches on the Autocomplete component.
💄 Polish on the Pagination component (#19933, #19964, #19966, #19987) @pvdstel @eps1lon @mbrookes.

[Chip] Prevent event default when onDelete is triggered (#20051) @eps1lon
[Container] Reset display block (#19971) @oliviertassinari
[DatePicker] Fix codesandbox demo (#19926) @netochaves
[Drawer] Add a comment for clarity on the styling of height of the toolbar (#19934) @smerriman18
[Grid] Fix row-reverse typo (#20048) @jhthompson
[Link] Fix color mismatch with Typography component (#19949) Weslen do Nascimento
[ListItemText] Fix display block issue (#20039) @psdr03
[Select] Simplify the demos (remove ref) (#20076) @captain-yossarian
[TablePagination] Out of range warning when "count={-1}" (#19874) @dbarabashdev
[TextField] Avoid outline label CSS leak (#19937) @ivoiv
[TextField] Fix outlined render gap if label = empty string (#19722) @captain-yossarian
[TextField] Minimize usage of z-index (#19547)" (#20016) @piotros
[theme] Describe what each argument of theme.spacing affects (#19962) @eps1lon
[theme] Array reject on spacing transformation fixed (#19900) Weslen do Nascimento
[Tooltip] Fix useMemo dependency (#19899) @NMinhNguyen
[Tooltip] Reduce enterDelay to 100ms (#19898) @oliviertassinari

[styles] Fix theme default props overriden by Component default (#20091) @adridavid
[styles] Name anonymous function type (#19996) @eps1lon

[theme] Array reject on spacing transformation fixed (#19900) Weslen do Nascimento

[Autocomplete] Add more details in the onChange event (#19959) @akharkhonov
[Autocomplete] Add scrollbar support in IE11 (#19969) @SergeyUstinovich
[Autocomplete] Better synchronize the highlight with the value (#19923) @captain-yossarian
[Autocomplete] Document listbox limitation (#20101) @zatine
[Autocomplete] Fix clearOnEscape + multiple combination (#20065) @chaudharykiran
[Autocomplete] Fix GitHub's demo behavior (#19928) @hasanozacar
[Autocomplete] Fix typo in prop description (#20086) @vince1995
[Autocomplete] Improvement popup open logic (#19901) @haseebdaone
[Autocomplete] Make categories more obvious (#20142) @embeddedt
[Autocomplete] Simplify error for wrong getOptionLabel (#20103) @oliviertassinari
[Autocomplete] Update onChange API @oliviertassinari
[Autocomplete] Use getOptionLabel over stringify (#19974) @a-type
[AvatarGroup] Add max avatar prop (#19853) @GFynbo
[Pagination] Add TypeScript types (#19933) @pvdstel
[Pagination] Fix prop forwarding of onChange and page (#19964) @eps1lon
[Pagination] Leverage @default over default values (#19966) @eps1lon
[Pagination] Remove children prop (#19987) @mbrookes
[Rating] Fix text alignment inheritance (#20055) @mlizchap
[Skeleton] Fix SkeletonClassKey type (#20047) @100terres
[Skeleton] Improve wave dark mode support (#20112) @oliviertassinari

[docs] Add radio error demo (#19599) @mbrookes
[docs] Bump next to latest (#19995) @eps1lon
[docs] Display color preview in IntelliSense (#20079) @eps1lon
[docs] Document typescript:transpile script (#19951) @eps1lon
[docs] Fix @material-ui/styles release version number (#19939) @jkjustjoshing
[docs] Fix OutlinedLabel typo (#20006) @ljcooke
[docs] Fix SEO issues (#20108) @oliviertassinari
[docs] Fix Sketch link (#19944) @mbrookes
[docs] Fix grammar in autocomplete doc (#20066) @dandv
[docs] Fix incorrect type for fontWeight @eps1lon
[docs] Fix missing OutlinedLabel#label link in Select API docs (#19993) @eps1lon
[docs] Flexbox, add element for show the good effect (#19956) @tbredillet
[docs] Flexbox: update item number (#19954) @tbredillet
[docs] Improve font size scaling of some demos (#19950) @eps1lon
[docs] Remove premium support offerings (#19972) @mbrookes
[docs] Simplify checkbox examples (#20052) @tacigar
[docs] Simplify some demos (#19608) @mbrookes
[docs] Track bundle size of pages (#19978) @eps1lon
[docs] Upgrade to next 9 (#18441) @eps1lon
[docs] Simplify drawer examples (#20040) @TommyJackson85
[examples] Fix typo in gatsby readme (#19998) @eps1lon

[test] Match against messages not args on console methods (#20046) @eps1lon
[test] Resize screenshots with sharp (#19979) @oliviertassinari
[test] Run snapshot tests on the a11y tree (#20019) @eps1lon
[ci] Fix azure not running (#20127) @eps1lon
[ci] Fix incorre pr number for experimental scripts (#20021) @eps1lon
[ci] Let failed types-next jobs pass (#20007) @eps1lon
[ci] Let failed types-next jobs pass (#20017) @eps1lon
[core] Add missing properties to TypeAction (#20075) @timonweber
[core] Add spacing after prettier command (#20073) @dandv
[core] Batch small changes (#20111) @oliviertassinari
[core] Fix typos in code comments (#19999) @eps1lon
[core] Improve the DX when iterating on components (#20128) @oliviertassinari
[core] Use Babel 7 version of transform-react-constant-elements (#20015) @merceyz
[security] Bump acorn from 5.7.3 to 5.7.4 (#20105) @dependabot-preview
[core] Batch small changes (#19896) @oliviertassinari
[core] Update type defs to use OverridableComponent (#20110) @theGirrafish
[core] Fix docs:api cleaning the wrong directory #20164 @ro7584