Fix failed to compile

[ggdaltoso]

Steps to reproduce:

1. clone the repo in your machine
2. build the packages and make them able to install locally

yarn lerna run build --stream --scope=@react95/{core,icons,clippy} && yarn lerna run prepublishOnly

3. Open a terminal and create a CRA in the same level as React95 was cloned

npx create-react-app my-app --template file:React95/packages/cra-template

4. run your project

npm start

closes #331

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[allyssonsantos]

Hi @ggdaltoso!

I tried to make it work with a fresh CRA application (without using the template), and, when I tried to install @react/core with npm it throwed me an error due peerDependencies versions, so, I've fixed it. This also make the template back working again