feat(monorepo): use es modules

[achrinza]

This PR is to test the waters of migrating packages to ES Modules. Only @loopback/monorepo and bin/ scripts are affected.

Signed-off-by: Rifa Achrinza [email protected]

Checklist

• [x] DCO (Developer Certificate of Origin) signed in all commits
• [x] npm test passes on your machine
• New tests added or existing tests modified to cover all changes
• [x] Code conforms with the style guide
• API Documentation in code was updated
• Documentation in /docs/site was updated
• Affected artifact templates in packages/cli were updated
• Affected example projects in examples/* were updated

👉 Check out how to submit a PR 👈

[coveralls]

Pull Request Test Coverage Report for Build 1377248540

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 76.034%

---

Totals
Change from base Build 1368859937:	0.0%
Covered Lines:	16923
Relevant Lines:	17910

---

💛 - Coveralls