fix: security patch

[LayZeeDK]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)
• The latest artifacts are committed (run yarn build)

PR Type

What kind of change does this PR introduce?

[x] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[x] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Other... Please describe:

What is the current behavior?

1. Targeting ES2017.
2. Using outdated and insecure packages.

Issue Number: N/A

What is the new behavior?

1. Targeting ES2019 (supported by Node.js 12.x).
2. Most of our dependencies are updated to latest or latest compatible versions.

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information

• Some files were formatted.
• Closes chore(deps): bump handlebars from 4.7.6 to 4.7.7 #28.
• Closes chore(deps): bump hosted-git-info from 2.8.8 to 2.8.9 #29.
• Closes chore(deps): bump lodash from 4.17.20 to 4.17.21 #30.

[NachoVazquez]

LGTM!