v4.9.3

Big thanks to the 18 contributors who made this release possible.

@material-ui/core@v4.9.3

• [l10n] Add Estonian (et-EE) locale (#19707) @villuv
• [ScopedCssBaseline] Allow css to be only applied on children (#19669) @TomPradat

@material-ui/system@v4.9.3

• [system] Add boxSizing to sizing styled system (#19684) @mesteche

@material-ui/lab@v4.0.0-alpha.43

• [Autocomplete] Improve freeSolo UX (#19663) @itelofilho
• [Autocomplete] Make options required (#19648) @alexandesigner
• [Pagination] Second iteration (#19612) @oliviertassinari

Docs

• [TreeView] Add recursive demo (#19636) @captain-yossarian
• [docs] Encourage mui-rff (#19676) @lookfirst
• [docs] Fix missing import in auto-dark theme palette example (#19694) @vinyldarkscratch
• [docs] Fix typo in sticky footer template (#19695) @bryndyment
• [docs] List default attributes first (#19693) @amcasey
• [docs] Revamp the notifications (#19615) @mbrookes
• [docs] Revert sidebar scrolling (#19678) @kristenmills
• [docs] Switch to cross-fetch (#19644) @eps1lon
• [docs] Update codemod documentation (#19661) @larsenwork
• [docs] What's the lab about? (#19611) @jcafiero

Core

• [core] Export TypographyVariant type (#19598) @aleccaputo
• [core] Host normalize-scroll-left (#19638) @oliviertassinari
• [core] Misc dependency fixes (#19643) @eps1lon
• [core] Batch small changes (#19639) @oliviertassinari
• [core] Batch small changes (#19717) @oliviertassinari