Tests fail on new multi project on Windows

[ericis]

Steps to reproduce

• Windows 10
• oclif multi mynewcli
• cd mynewcli
• npm run tests

Error

TSError: ⨯ Unable to compile TypeScript:
error TS6304: Composite projects may not disable declaration emit.

Related to issue: #656

Work-around

1. Edit ./test/tsconfig.json

{
  "extends": "../tsconfig",
  "compilerOptions": {
    "noEmit": true,
    "typeRoots": [
      "../node_modules/@types"
    ]
  },
  "references": [
    {
      "path": ".."
    }
  ]
}

2. npm run test

[ericis]

Wrong repo. Should've gone here: oclif/oclif#172