Update dependency @embroider/test-setup to v1.8.1

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@embroider/test-setup	1.8.0 -> 1.8.1

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Release Notes

embroider-build/embroider

### [`v1.8.1`](https://togithub.com/embroider-build/embroider/blob/HEAD/CHANGELOG.md#v181-2022-07-01) [Compare Source](https://togithub.com/embroider-build/embroider/compare/v1.8.0...v1.8.1) ##### :bug: Bug Fix - `addon-dev` - [#​1227](https://togithub.com/embroider-build/embroider/pull/1227) add-dev: HBS files were not watched for rebuilds ([@​ef4](https://togithub.com/ef4)) - `compat` - [#​1224](https://togithub.com/embroider-build/embroider/pull/1224) Don't apply the `ember-get-config` compat adapter when >= v2.1.0 ([@​bertdeblock](https://togithub.com/bertdeblock)) - `macros` - [#​1213](https://togithub.com/embroider-build/embroider/pull/1213) Prevent redundant toTree wrapping for macros ([@​raycohen](https://togithub.com/raycohen)) ##### :memo: Documentation - [#​1225](https://togithub.com/embroider-build/embroider/pull/1225) docs: Add lazy loaded engines EmbroiderRouter details to README ([@​richgt](https://togithub.com/richgt)) ##### Committers: 4 - Bert De Block ([@​bertdeblock](https://togithub.com/bertdeblock)) - Edward Faulkner ([@​ef4](https://togithub.com/ef4)) - Ray Cohen ([@​raycohen](https://togithub.com/raycohen)) - Rich Glazerman ([@​richgt](https://togithub.com/richgt))

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