Update dependency eslint to v8.9.0

This MR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
eslint (source)	8.7.0 -> 8.9.0

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Release Notes

eslint/eslint

v8.9.0

Compare Source

Features

• 68f64a9 feat: update eslint-scope to ignore "use strict" directives in ES3 (#​15595) (Milos Djermanovic)
• db57639 feat: add es2016, es2018, es2019, and es2022 environments (#​15587) (Milos Djermanovic)
• 2dc38aa feat: fix bug with arrow function return types in function-paren-newline (#​15541) (Milos Djermanovic)
• 6f940c3 feat: Implement FlatRuleTester (#​15519) (Nicholas C. Zakas)

Documentation

• 570a036 docs: add one-var example with for-loop initializer (#​15596) (Milos Djermanovic)
• 417191d docs: Remove the $ prefix in terminal commands (#​15565) (Andreas Lewis)
• 389ff34 docs: add missing Variable#scope property in the scope manager docs (#​15571) (Milos Djermanovic)
• f63795d docs: no-eval replace dead link with working one (#​15568) (rasenplanscher)
• 0383591 docs: Remove old Markdown issue template (#​15556) (Brandon Mills)
• a8dd5a2 docs: add 'when not to use it' section in no-duplicate-case docs (#​15563) (Milos Djermanovic)
• 1ad439e docs: add missed verb in docs (#​15550) (Jeff Mosawy)

Chores

• 586d45c chore: Upgrade to espree@9.3.1 (#​15600) (Milos Djermanovic)
• 623e1e2 chore: Upgrade to eslint-visitor-keys@3.3.0 (#​15599) (Milos Djermanovic)
• 355b23d chore: fix outdated link to Code of Conduct in MR template (#​15578) (Rich Trott)
• b10fef2 ci: use Node 16 for browser test (#​15569) (Milos Djermanovic)
• 92f89fb chore: suggest demo link in bug report template (#​15557) (Brandon Mills)

v8.8.0

Compare Source

Features

• 5d60812 feat: implement rfc 2021-suppression-support (#​15459) (Yiwei Ding)

Documentation

• 5769cc2 docs: fix relative link (#​15544) (Nick Schonning)
• ccbc35f docs: trimmed rules h1s to just be rule names (#​15514) (Josh Goldberg)
• 851f1f1 docs: fixed typo in comment (#​15531) (Jiapei Liang)
• 7d7af55 docs: address upcoming violation of markdownlint rule MD050/strong-style (#​15529) (David Anson)

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