@material-ui/styled-engine-sc fails TypeScript build with skipLibCheck: false

• The issue is present in the latest release.
• I have searched the issues of this repository and believe that this is not a duplicate.

Current Behavior 😯

When running tsc, the following errors come up:

node_modules/@material-ui/styled-engine/GlobalStyles/GlobalStyles.d.ts:2:31 - error TS2307: Cannot find module '@emotion/styled' or its corresponding type declarations.

2 import { Interpolation } from '@emotion/styled';
                                ~~~~~~~~~~~~~~~~~

node_modules/@material-ui/styled-engine/index.d.ts:1:15 - error TS2307: Cannot find module '@emotion/styled' or its corresponding type declarations.

1 export * from '@emotion/styled';
                ~~~~~~~~~~~~~~~~~

node_modules/@material-ui/styled-engine/index.d.ts:2:25 - error TS2307: Cannot find module '@emotion/styled' or its corresponding type declarations.

2 export { default } from '@emotion/styled';
                          ~~~~~~~~~~~~~~~~~

node_modules/@material-ui/styled-engine/index.d.ts:3:46 - error TS2307: Cannot find module '@emotion/react' or its corresponding type declarations.

3 export { ThemeContext, keyframes, css } from '@emotion/react';

Expected Behavior 🤔

Compile without errors

Steps to Reproduce 🕹

Here’s a repo that’s TS version of the example repo provided for styled-components interoperability: https://github.com/jqrun/create-react-app-with-styled-components

Steps:

1. npm install
2. npm run tsc

Context 🔦

Your Environment 🌎

`npx @material-ui/envinfo`

  System:
    OS: macOS 11.2.3
  Binaries:
    Node: 15.0.1 - ~/.nvm/versions/node/v15.0.1/bin/node
    Yarn: 1.22.10 - /usr/local/bin/yarn
    npm: 7.5.2 - ~/.nvm/versions/node/v15.0.1/bin/npm
  Browsers:
    Chrome: 89.0.4389.114
    Edge: Not Found
    Firefox: Not Found
    Safari: 14.0.3
  npmPackages:
    @material-ui/core: next => 5.0.0-alpha.29 
    @material-ui/lab: next => 5.0.0-alpha.29 
    @material-ui/styled-engine:  5.0.0-alpha.25 
    @material-ui/styled-engine-sc: next => 5.0.0-alpha.25 
    @material-ui/styles:  5.0.0-alpha.29 
    @material-ui/system:  5.0.0-alpha.29 
    @material-ui/types:  5.1.7 
    @material-ui/unstyled:  5.0.0-alpha.29 
    @material-ui/utils:  5.0.0-alpha.29 
    @types/react: ^17.0.3 => 17.0.3 
    react: latest => 17.0.2 
    react-dom: latest => 17.0.2 
    styled-components: latest => 5.2.3 
    typescript: ^4.2.3 => 4.2.3 

[oliviertassinari]

@mnajdova Sounds great

[mnajdova]

@jqrun great! @oliviertassinari do you think it would be helpful if we include an example of styled-components + TypeScript? @jqrun would you be interested in adding it in our examples?