Add nestjs/core to peer dependencies

[Nergie]

I'm submitting a...

[ ] Regression 
[X] Bug report
[ ] Feature request
[ ] Documentation issue or request
[ ] Support request => Please do not submit support request here, instead post your question on Stack Overflow.

Current behavior

@nestjs/core can't be resolved in my monorepo.
I get this error Cannot find module '@nestjs/core' .
I'm using lerna and yarn workspace to share modules across my packages.

@nestjs/schedule is installed in the project’s root node_modules.
@nestjs/core is installed in the node_modules of packages.
Folder architecture:

Expected behavior

Install @nestjs/schedule in the same folder as @nestjs/core

Minimal reproduction of the problem with instructions

What is the motivation / use case for changing the behavior?

Add @nestjs/core in the peer dependencies of @nestjs/schedule will fix this issue.

"peerDependencies": {
    "@nestjs/common": "^6.10.11 || ^7.0.0 || ^8.0.0",
    "reflect-metadata": "^0.1.12",
    "@nestjs/core": "^7.0.0 || ^8.0.0"
  },

Environment

Nest version: 8.Y.Z

 
For Tooling issues:
Nest version: 7.6.15

    "@nestjs/common": "^8.0.3",
    "@nestjs/config": "^1.0.1",
    "@nestjs/core": "^8.0.3",
    "@nestjs/event-emitter": "^1.0.0",
    "@nestjs/jwt": "^8.0.0",
    "@nestjs/passport": "^8.0.0",
    "@nestjs/platform-express": "^8.0.3",
    "@nestjs/schedule": "^1.0.0",
    "@nestjs/swagger": "^5.0.8",
 
For Tooling issues:
- Node version: v14.17.0
- Platform:  Mac

Others:
Using Yarn and Lerna

[kamilmysliwiec]

Would you like to create a PR for this issue?

[Nergie]

Would you like to create a PR for this issue?

Yes.
The PR is available here.
Thank you.

[kamilmysliwiec]

Thanks @Nergie!