Bump eslint from 7.7.0 to 7.31.0 in /frontend

Sourced from eslint's releases.

<h2>v7.31.0</h2>

• efdbb12 Upgrade: @​eslint/eslintrc to v0.4.3 (#14808) (Brandon Mills)
• a96b05f Update: add end location to report in consistent-return (refs #12334) (#14798) (Nitin Kumar)
• e0e8e30 Docs: update BUG_REPORT template (#14787) (Nitin Kumar)
• 39115c8 Docs: provide more context to no-eq-null (#14801) (gfyoung)
• 9a3c73c Docs: fix a broken link (#14790) (Sam Chen)
• ddffa8a Update: Indicating the operator in question (#14764) (Paul Smith)
• bba714c Update: Clarifying what changes need to be made in no-mixed-operators (#14765) (Paul Smith)
• b0d22e3 Docs: Mention benefit of providing meta.docs.url (#14774) (Bryan Mishkin)
• 000cc79 Sponsors: Sync README with website (ESLint Jenkins)
• a6a7438 Chore: pin fs-teardown@0.1.1 (#14771) (Milos Djermanovic)

<h2>v7.30.0</h2>

• 5f74642 Chore: don't check Program.start in SourceCode#getComments (refs #14744) (#14748) (Milos Djermanovic)
• 19a871a Docs: Suggest linting plugins for ESLint plugin developers (#14754) (Bryan Mishkin)
• aa87329 Docs: fix broken links (#14756) (Sam Chen)
• 278813a Docs: fix and add more examples for new-cap rule (fixes #12874) (#14725) (Nitin Kumar)
• ed1da5d Update: ecmaVersion allows &quot;latest&quot; (#14720) (薛定谔的猫)
• 104c0b5 Update: improve use-isnan rule to detect Number.NaN (fixes #14715) (#14718) (Nitin Kumar)
• b08170b Update: Implement FlatConfigArray (refs #13481) (#14321) (Nicholas C. Zakas)
• f113cdd Chore: upgrade eslint-plugin-eslint-plugin (#14738) (薛定谔的猫)
• 1b8997a Docs: Fix getRulesMetaForResults link syntax (#14723) (Brandon Mills)
• aada733 Docs: fix two broken links (#14726) (Sam Chen)
• 8972529 Docs: Update README team and sponsors (ESLint Jenkins)

<h2>v7.29.0</h2>

• bfbfe5c New: Add only to RuleTester (refs eslint/rfcs#73) (#14677) (Brandon Mills)
• c2cd7b4 New: Add ESLint#getRulesMetaForResults() (refs #13654) (#14716) (Nicholas C. Zakas)
• eea7e0d Chore: remove duplicate code (#14719) (Nitin Kumar)
• 6a1c7a0 Fix: allow fallthrough comment inside block (fixes #14701) (#14702) (Kevin Gibbons)
• a47e5e3 Docs: Add Mega-Linter to the list of integrations (#14707) (Nicolas Vuillamy)
• 353ddf9 Chore: enable reportUnusedDisableDirectives in eslint-config-eslint (#14699) (薛定谔的猫)
• 757c495 Chore: add some rules to eslint-config-eslint (#14692) (薛定谔的猫)
• c93a222 Docs: fix a broken link (#14697) (Sam Chen)
• 655c118 Sponsors: Sync README with website (ESLint Jenkins)
• e2bed2e Sponsors: Sync README with website (ESLint Jenkins)
• 8490fb4 Sponsors: Sync README with website (ESLint Jenkins)
• ddbe877 Sponsors: Sync README with website (ESLint Jenkins)

<h2>v7.28.0</h2>

• 1237705 Upgrade: @​eslint/eslintrc to 0.4.2 (#14672) (Milos Djermanovic)
• 123fb86 Docs: Add Feedback Needed triage description (#14670) (Nicholas C. Zakas)
• c545163 Update: support multiline /eslint-env/ directives (fixes #14652) (#14660) (薛定谔的猫)
• 8d1e75a Upgrade: glob-parent version in package.json (#14658) (Hamza Najeeb)
• 1f048cb Fix: no-implicit-coercion false positive with String() (fixes #14623) (#14641) (Milos Djermanovic)
• d709abf Chore: fix comment location in no-unused-vars (#14648) (Milos Djermanovic)
• e44ce0a Fix: no-duplicate-imports allow unmergeable (fixes #12758, fixes #12760) (#14238) (Soufiane Boutahlil)
• bb66a3d New: add getPhysicalFilename() method to rule context (fixes #11989) (#14616) (Nitin Kumar)
• 2e43dac Docs: fix no-sequences example (#14643) (Nitin Kumar)
• 958ff4e Docs: add note for arrow functions in no-seq rule (#14578) (Nitin Kumar)

... (truncated)

Sourced from eslint's changelog.

v7.31.0 - July 17, 2021

• efdbb12 Upgrade: @​eslint/eslintrc to v0.4.3 (#14808) (Brandon Mills)
• a96b05f Update: add end location to report in consistent-return (refs #12334) (#14798) (Nitin Kumar)
• e0e8e30 Docs: update BUG_REPORT template (#14787) (Nitin Kumar)
• 39115c8 Docs: provide more context to no-eq-null (#14801) (gfyoung)
• 9a3c73c Docs: fix a broken link (#14790) (Sam Chen)
• ddffa8a Update: Indicating the operator in question (#14764) (Paul Smith)
• bba714c Update: Clarifying what changes need to be made in no-mixed-operators (#14765) (Paul Smith)
• b0d22e3 Docs: Mention benefit of providing meta.docs.url (#14774) (Bryan Mishkin)
• 000cc79 Sponsors: Sync README with website (ESLint Jenkins)
• a6a7438 Chore: pin fs-teardown@0.1.1 (#14771) (Milos Djermanovic)

v7.30.0 - July 2, 2021

• 5f74642 Chore: don't check Program.start in SourceCode#getComments (refs #14744) (#14748) (Milos Djermanovic)
• 19a871a Docs: Suggest linting plugins for ESLint plugin developers (#14754) (Bryan Mishkin)
• aa87329 Docs: fix broken links (#14756) (Sam Chen)
• 278813a Docs: fix and add more examples for new-cap rule (fixes #12874) (#14725) (Nitin Kumar)
• ed1da5d Update: ecmaVersion allows &quot;latest&quot; (#14720) (薛定谔的猫)
• 104c0b5 Update: improve use-isnan rule to detect Number.NaN (fixes #14715) (#14718) (Nitin Kumar)
• b08170b Update: Implement FlatConfigArray (refs #13481) (#14321) (Nicholas C. Zakas)
• f113cdd Chore: upgrade eslint-plugin-eslint-plugin (#14738) (薛定谔的猫)
• 1b8997a Docs: Fix getRulesMetaForResults link syntax (#14723) (Brandon Mills)
• aada733 Docs: fix two broken links (#14726) (Sam Chen)
• 8972529 Docs: Update README team and sponsors (ESLint Jenkins)

v7.29.0 - June 18, 2021

• bfbfe5c New: Add only to RuleTester (refs eslint/rfcs#73) (#14677) (Brandon Mills)
• c2cd7b4 New: Add ESLint#getRulesMetaForResults() (refs #13654) (#14716) (Nicholas C. Zakas)
• eea7e0d Chore: remove duplicate code (#14719) (Nitin Kumar)
• 6a1c7a0 Fix: allow fallthrough comment inside block (fixes #14701) (#14702) (Kevin Gibbons)
• a47e5e3 Docs: Add Mega-Linter to the list of integrations (#14707) (Nicolas Vuillamy)
• 353ddf9 Chore: enable reportUnusedDisableDirectives in eslint-config-eslint (#14699) (薛定谔的猫)
• 757c495 Chore: add some rules to eslint-config-eslint (#14692) (薛定谔的猫)
• c93a222 Docs: fix a broken link (#14697) (Sam Chen)
• 655c118 Sponsors: Sync README with website (ESLint Jenkins)
• e2bed2e Sponsors: Sync README with website (ESLint Jenkins)
• 8490fb4 Sponsors: Sync README with website (ESLint Jenkins)
• ddbe877 Sponsors: Sync README with website (ESLint Jenkins)

v7.28.0 - June 4, 2021

• 1237705 Upgrade: @​eslint/eslintrc to 0.4.2 (#14672) (Milos Djermanovic)
• 123fb86 Docs: Add Feedback Needed triage description (#14670) (Nicholas C. Zakas)
• c545163 Update: support multiline /eslint-env/ directives (fixes #14652) (#14660) (薛定谔的猫)
• 8d1e75a Upgrade: glob-parent version in package.json (#14658) (Hamza Najeeb)
• 1f048cb Fix: no-implicit-coercion false positive with String() (fixes #14623) (#14641) (Milos Djermanovic)
• d709abf Chore: fix comment location in no-unused-vars (#14648) (Milos Djermanovic)

... (truncated)

• ad39518 7.31.0
• faf2fe8 Build: changelog update for 7.31.0
• efdbb12 Upgrade: @​eslint/eslintrc to v0.4.3 (#14808)
• a96b05f Update: add end location to report in consistent-return (refs #12334) (#14798)
• e0e8e30 Docs: update BUG_REPORT template (#14787)
• 39115c8 Docs: provide more context to no-eq-null (#14801)
• 9a3c73c Docs: fix a broken link (#14790)
• ddffa8a Update: Indicating the operator in question (#14764)
• bba714c Update: Clarifying what changes need to be made in no-mixed-operators (#14765)
• b0d22e3 Docs: Mention benefit of providing meta.docs.url (#14774)
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