Local build differs from CI build

[Flarna]

Bootstrapping differs between local builds using npm install in root folder and CI builds.

Local builds execute lerna bootstrap --no-ci

CI builds execute lerna bootstrap --no-ci --hoist --nohoist='zone.js' --nohoist='mocha' --nohoist='ts-mocha'

I can't tell which variant is better/more correct but I think there should be no difference.

Refs.: #900 (fixes an issue which happens in CI but not local)

[blumamir]

I added it to the CI.
At the time, it was not possible to hoist with npm7 due to peer dependencies issues, so I had to disable the new peer-deps mechanism here.
I think it's best to review if those issues still affect us, and fix them if they do, so it always works for npm 7 + hoisting in CI and in local builds

[github-actions]

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