[v7] update `npm ci` command

[mikemimik]

Update npm ci command.

• rimraf the node_modules/ folder
• run arborist.reify()

Branches

• https://github.com/npm/cli/tree/mikemimik/feature/npm-ci-update

References

• Epic: MINI-EPIC: next steps for v7 integration 2020-03-03 #971
• Blocked by: feature/catch failed write of hidden lockfile arborist#53

[claudiahdz]

PR has been merged: #1100