Update dependency ember-cli-notifications to v8

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
ember-cli-notifications	7.0.0 -> 8.0.0

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Release Notes

mansona/ember-cli-notifications

v8.0.0

Compare Source

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• Replace overridable icon paths with overridable icon components #​324 from @​pichfl
• BREAKING: Remove obsolete equals helper #​326 from @​pichfl
• Breaking: Drop support for Node 10 and Modernize syntax #​320 from @​pichfl
• add no-deprecations ember-try scenarios #​322 from @​mansona
• Fix no-curly-component-invocation issues #​319 from @​Turbo87
• update lint-to-the-future #​318 from @​mansona
• Fix prettier issues #​315 from @​Turbo87
• Fix implicit-this issues #​314 from @​Turbo87
• add fail-fast: false for ember-try scenarios #​317 from @​mansona

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[Turbo87]

@bors r+

[bors]

📌 Commit e39eb93 has been approved by Turbo87

[bors]

⌛ Testing commit e39eb93 with merge 31f4d1d...

[bors]

☀️ Test successful - checks-actions
Approved by: Turbo87
Pushing 31f4d1d to master...