Update dependency ember-cli to v3.28.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
ember-cli (source)	3.27.0 -> 3.28.0

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Release Notes

ember-cli/ember-cli

v3.28.0

Compare Source

Blueprint Changes

• ember new diff
• ember addon diff

Changelog

• #​9505 Pass realPath as root rather than the dirname for addonMainPath @​brendenpalmer
• #​9507 Add a new config, ember-addon.projectRoot, to specify the location of the project @​brendenpalmer
• #​9530 Drop Node 10 support @​rwjblue
• #​9487 Add support for creating a single addon instance per bundle root (which enables dramatically reducing the total number of addon instances) @​davecombs
• #​9524 Update CONTRIBUTING.md to reference cli.emberjs.com @​loganrosen
• #​9533 Ensure package-info objects are stable when they represent the same addon @​brendenpalmer
• #​9538 ensure backwards compatibility is maintained with packageRoot and root @​brendenpalmer
• #​9539 avoid setting root as realPath from the package-info object @​brendenpalmer
• #​9537 Implement LCA host/host addons logic in ember-cli @​brendenpalmer
• #​9540 Use relative override paths in blueprint ESLint config @​loganrosen
• #​9542 Add validation checks for addon instance bundle caching @​brendenpalmer
• #​9543 Add ability to specify a custom ember-addon.perBundleAddonCacheUtil utility @​brendenpalmer
• #​9562 Update addon-proxy to support Embroider @​brendenpalmer
• #​9565 Drop Node 10 support in blueprint engine spec @​elwayman02
• #​9568 [BUGFIX release] Skip babel for qunit with embroider @​ctjhoa

Thank you to all who took the time to contribute!

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