Preact and preact-testing-library should be defined as devDependencies

[aduth]

preact and @testing-library/preact are defined as peer dependencies:

preact-hooks-testing-library/package.json

Lines 34 to 37 in 9badbd2

	"peerDependencies": {
	"@testing-library/preact": "^1.0.2",
	"preact": "^10.4.1"
	},

This makes sense for external consumers, but causes issues in local development, since TypeScript type checking will be unable to find types for the preact and @testing-library/preact packages, unless they are available in global caches.

To ensure that type definitions for preact and @testing-library/preact are available, they should be additionally be installed as devDependencies.