chore(deps): stable ember infrastructure (patch)

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
ember-source (source)	devDependencies	patch	3.20.0 -> 3.20.1
eslint-plugin-ember	devDependencies	patch	8.9.1 -> 8.9.2

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Release Notes

emberjs/ember.js

### [`v3.20.1`](https://togithub.com/emberjs/ember.js/blob/master/CHANGELOG.md#v3201-July-13-2020) [Compare Source](https://togithub.com/emberjs/ember.js/compare/v3.20.0...v3.20.1) - [#​19040](https://togithub.com/emberjs/ember.js/pull/19040) [BUGFIX] Fix a memory leak that occurred when changing the array passed to `{{each}}`

ember-cli/eslint-plugin-ember

### [`v8.9.2`](https://togithub.com/ember-cli/eslint-plugin-ember/blob/master/CHANGELOG.md#v892-2020-07-23) [Compare Source](https://togithub.com/ember-cli/eslint-plugin-ember/compare/v8.9.1...v8.9.2) ##### :bug: Bug Fix - [#​895](https://togithub.com/ember-cli/eslint-plugin-ember/pull/895) Update [no-test-import-export](https://togithub.com/ember-cli/eslint-plugin-ember/blob/master/docs/rules/no-test-import-export.md) rule to allow importing from anything under `tests/helpers` path ([@​bmish](https://togithub.com/bmish)) - [#​894](https://togithub.com/ember-cli/eslint-plugin-ember/pull/894) Ensure [no-attrs-in-components](https://togithub.com/ember-cli/eslint-plugin-ember/blob/master/docs/rules/no-attrs-in-components.md) rule only runs inside components ([@​bmish](https://togithub.com/bmish)) - [#​893](https://togithub.com/ember-cli/eslint-plugin-ember/pull/893) Support array element access in [no-get](https://togithub.com/ember-cli/eslint-plugin-ember/blob/master/docs/rules/no-get.md) rule autofix ([@​bmish](https://togithub.com/bmish)) ##### :house: Internal - [#​888](https://togithub.com/ember-cli/eslint-plugin-ember/pull/888) Add npm-package-json-lint ([@​bmish](https://togithub.com/bmish)) ##### Committers: 1 - Bryan Mishkin ([@​bmish](https://togithub.com/bmish))

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