chore(deps): update dependency ember-cli-typescript to v1.5.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change	References
ember-cli-typescript	devDependencies	minor	1.4.3 -> 1.5.0	source

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Release Notes

typed-ember/ember-cli-typescript

v1.5.0

Compare Source

Fixed

• We now provide better user feedback when installing ember-cli-typescript from a git version (i.e. for testing prereleases)
• Updated to ember-cli-typescript-blueprints so types in generated files correctly match the latest Ember Data types
• Updated to latest Ember CLI blueprint (as of 3.5.0)

v1.4.4

Compare Source

Fixed

• We no longer claim the absolute highest priority when ember-cli is selecting blueprints (see #​323)

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