Coverage directory created in ./web

[jondewoo]

With a fresh Redwood blog (yarn create redwood-app ./redwoodblog):

1. running yarn rw test --coverage creates the coverage directory in ./web
2. running yarn rw test api --coverage or yarn rw test web --coverage creates the coverage directory in the project's root directory
3. running yarn rw test --coverage --coverageDirectory=./coverage is equivalent to (1)
4. as a workaround, running yarn rw test --coverage --coverageDirectory=`pwd`/coverage creates the coverage directory in the project's root directory

[jondewoo]

Sorry, wrong repo.