Update dependency eslint to v8.21.0 - autoclosed

This MR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
eslint (source)	8.19.0 -> 8.21.0

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Release Notes

eslint/eslint

v8.21.0

Compare Source

Features

• 7b43ea1 feat: Implement FlatESLint (#​16149) (Nicholas C. Zakas)
• 92bf49a feat: improve the key width calculation in key-spacing rule (#​16154) (Nitin Kumar)
• c461542 feat: add new allowLineSeparatedGroups option to the sort-keys rule (#​16138) (Nitin Kumar)
• 1cdcbca feat: add deprecation warnings for legacy API in RuleTester (#​16063) (Nitin Kumar)

Bug Fixes

• 0396775 fix: lines-around-comment apply allowBlockStart for switch statements (#​16153) (Nitin Kumar)

Documentation

• 2aadc93 docs: add anchors to headings inside docs content (#​16134) (Strek)

Chores

• 8892511 chore: Upgrade to Espree 9.3.3 (#​16173) (Brandon Mills)
• 1233bee chore: switch to eslint-plugin-node's maintained fork (#​16150) (唯然)
• 97b95c0 chore: upgrade puppeteer v13 (#​16151) (唯然)

v8.20.0

Compare Source

Features

• ca83178 feat: catch preprocess errors (#​16105) (JounQin)

Bug Fixes

• 30be0ed fix: no-warning-comments rule escapes special RegEx characters in terms (#​16090) (Lachlan Hunt)
• bfe5e88 fix: ignore spacing before ] and } in comma-spacing (#​16113) (Milos Djermanovic)

Documentation

• 845c4f4 docs: Add website team details (#​16115) (Nicholas C. Zakas)
• 5a0dfdb docs: Link to blog post in no-constant-binary-expression (#​16112) (Jordan Eldredge)
• bc692a9 docs: remove install command (#​16084) (Strek)
• 49ca3f0 docs: don't show toc when content not found (#​16095) (Amaresh S M)
• ba19e3f docs: enhance 404 page UI (#​16097) (Amaresh S M)
• a75d3b4 docs: remove unused meta.docs.category field in working-with-rules page (#​16109) (Brandon Scott)
• cdc0206 docs: add formatters page edit link (#​16094) (Amaresh S M)
• 4d1ed22 docs: preselect default theme (#​16098) (Strek)
• 4b79612 docs: add missing correct/incorrect containers (#​16087) (Milos Djermanovic)
• 09f6acb docs: fix UI bug on rules index and details pages (#​16082) (Deepshika S)
• f5db264 docs: remove remaining duplicate rule descriptions (#​16093) (Milos Djermanovic)
• 32a6b2a docs: Add scroll behaviour smooth (#​16056) (Amaresh S M)

Chores

• bbf8df4 chore: Mark autogenerated release blog post as draft (#​16130) (Nicholas C. Zakas)
• eee4306 chore: update internal lint dependencies (#​16088) (Bryan Mishkin)
• 9615a42 chore: update formatter examples template to avoid markdown lint error (#​16085) (Milos Djermanovic)
• 62541ed chore: fix markdown linting error (#​16083) (唯然)

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