Fresh development: Heroku doesn't read engine from individual `package.json`, so for now I have engine in the monorepo root `package.json` only.
Bug 1518364 Comment 4 Edit History
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Fresh development: Heroku doesn't read engine from individual `package.json`, so for now I have engine in the monorepo root `package.json` only. Also, when running tests locally, individual `package.json` overrides the root one. I haven't experimented with GKE deployments yet. So for now makes sense all-round to just keep engine in one place - in the root `package.json`