Incorrect values for properties are allowed

[Cerber-Ursi]

Current behavior:

emotion's CssObject type allows for incorrect property values.

To reproduce:

This error was actually found by bumping csstypes dependency and running dtslint on @emotion/serialize package, so the reproduction is already there; minimized:

import { CSSObject } from '@emotion/serialize'
const cssObject: CSSObject = { fontWeight: 'wrong' }

With csstypes@3.1.2, this compiles successfully.

Expected behavior:

With csstypes@3.0.2, i.e. the minimal version required by @emotion/serialize, this code errors as expected.

Environment information:

• @emotion/react version: current main branch at the moment of issue creation, i.e. commit 1c6031.