Update dependency eslint-plugin-ember to v9

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
eslint-plugin-ember	devDependencies	major	^8.12.0 -> ^9.0.0

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Release Notes

ember-cli/eslint-plugin-ember

v9.0.0

Compare Source

💥 Breaking Change

• #​940 Enable additional recommended rules (@​bmish)
  • no-assignment-of-untracked-properties-used-in-tracking-contexts
  • no-controller-access-in-routes
  • no-invalid-test-waiters
  • no-noop-setup-on-error-in-before
  • no-test-this-render
  • prefer-ember-test-helpers
• #​943 Enable catchEvents option in no-side-effects rule (@​bmish)
• #​942 Enable catchSafeObjects option in no-get rule (@​bmish)
• #​941 Enable catchRouterMicrolib and catchRouterMain options in no-private-routing-service rule (@​bmish)
• #​939 Drop ESLint 5 support and add peer dependency on ESLint 6+ (@​bmish)
• #​938 Drop Node 13 support (@​bmish)

Committers: 1

• Bryan Mishkin (@​bmish)

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