chore: do not escape strings in snapshots

[SimenB]

What:

I noticed while going through some of your snapshots that they're harder to read than they need to be. Turning off string escaping (which will probably be the default in a future Jest major version) makes it easier

Why:

Easier to read snapshots makes them easier to maintain

How:

Added jest config and ran yarn jest -u. I had to manually mess around in packages/styled/__tests__/warnings.js and packages/css/test/no-babel/warnings.test.js due to some weird syntax errors (either with flow annotations or jsx) - not sure why.

Checklist:

• Documentation
• Tests
• Code complete
• Changeset

[changeset-bot]

⚠️ No Changeset found

Latest commit: 20f8d51

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[codesandbox-ci]

This pull request is automatically built and testable in CodeSandbox.

To see build info of the built libraries, click here or the icon next to each commit SHA.

Latest deployment of this branch, based on commit 20f8d51:

Sandbox	Source
Emotion	Configuration