[eslint-plugin] Fix conflicting dependency on eslint

[xty]

Description

This PR addresses the following warnings raised when installing @shopify/eslint-plugin:

npm WARN ERESOLVE overriding peer dependency
npm WARN While resolving: eslint-plugin-promise@5.2.0
npm WARN Found: eslint@8.10.0
npm WARN node_modules/eslint
npm WARN   peer eslint@"^8.3.0" from @shopify/eslint-plugin@41.1.0
npm WARN   node_modules/@shopify/eslint-plugin
npm WARN     dev @shopify/eslint-plugin@"*" from the root project
npm WARN   20 more (@babel/eslint-parser, @babel/eslint-plugin, ...)
npm WARN
npm WARN Could not resolve dependency:
npm WARN peer eslint@"^7.0.0" from eslint-plugin-promise@5.2.0
npm WARN node_modules/eslint-plugin-promise
npm WARN   eslint-plugin-promise@"^5.1.1" from @shopify/eslint-plugin@41.1.0
npm WARN   node_modules/@shopify/eslint-plugin
npm WARN
npm WARN Conflicting peer dependency: eslint@7.32.0
npm WARN node_modules/eslint
npm WARN   peer eslint@"^7.0.0" from eslint-plugin-promise@5.2.0
npm WARN   node_modules/eslint-plugin-promise
npm WARN     eslint-plugin-promise@"^5.1.1" from @shopify/eslint-plugin@41.1.0
npm WARN     node_modules/@shopify/eslint-plugin

Apparently, the ERESOLVE error is caused by eslint-plugin-promise@^5.1.1 requiring eslint@^7.0.0 as a peer dependency, and is fixed by bumping eslint-plugin-promise to 6.0.0 (which added ESlint v8 support but had not been released at the time of #305).

Type of change

• Patch: Bug (non-breaking change which fixes an issue)
• Minor: New feature (non-breaking change which adds functionality)
• Major: Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist

• I have added a changelog entry, prefixed by the type of change noted above (Documentation fix and Test update does not need a changelog as we do not publish a new version for these changes)

[xty]

For users of @shopify/eslint-plugin, consider including the following in your package.json as a temporary workaround before this fix gets merged and published:

"overrides": {
	"@shopify/eslint-plugin": {
		"eslint-plugin-promise": "^6.0.0"
	}
} 

[xty]

CLA signed. @BPScott, please take a look .

[BPScott]

Thanks for spotting this! I'll try to get this released later today

[BPScott]

And published as v41.2.0