[Snyk] Security upgrade loopback from 2.42.0 to 3.20.0

[jonathan-casarrubias]

This PR was automatically created by Snyk using the credentials of a real user.

Snyk has created this PR to fix one or more vulnerable packages in the `npm` dependencies of this project.

#### Changes included in this PR - Changes to the following files to upgrade the vulnerable dependencies to a fixed version: - native-chat-api/package.json #### Vulnerabilities that will be fixed ##### With an upgrade: Severity | Priority Score (*) | Issue | Breaking Change | Exploit Maturity :-------------------------:|-------------------------|:-------------------------|:-------------------------|:-------------------------  | **596/1000**
**Why?** Proof of Concept exploit, Has a fix available, CVSS 5.5 | Arbitrary Code Injection
[SNYK-JS-UNDERSCORE-1080984](https://snyk.io/vuln/SNYK-JS-UNDERSCORE-1080984) | Yes | Proof of Concept (*) Note that the real score may have changed since the PR was raised.

Commit messages

Package name: loopback

The new version differs by 250 commits.

• 7d93b27 3.20.0
• 5a87f8d Merge pull request #3911 from strongloop/update-strong-globalize
• f17346b Update strong-globalize to 4.x
• 995c14e Merge pull request #3585 from mitsos1os/nodemailer-update
• 83fc62c Update nodemailer to v4.x
• 58090b4 Merge pull request #3908 from strongloop/drop-node-4x
• ec46c45 Drop support for Node.js 4.x
• 85aa3fd 3.19.3
• 8c4c91a Merge pull request #3904 from itaditya/patch-1
• cf5b78f Provide link to CODEOWNERS
• c6d8565 Merge pull request #3896 from wolrajhti/patch-2
• cc4fc21 fix bug in User.verify when confirm is disabled
• eb3301a Merge pull request #3899 from strongloop/add-node-10
• 36ef35d Enable Node.js 10.x on Travis CI
• 59b1409 3.19.2
• c2077df Merge pull request #3779 from nitro404/hotfix/case-insensitive-user-email
• b2bc449 Add check for undefined user email in setter
• 3e3092c 3.19.1
• 07e7592 Merge pull request #3883 from strongloop/fix/principal-type-polymorphic-user
• 2aead13 Fix isOwner() bug in multiple-principal setup
• df70f83 3.19.0
• 7a148ca Merge pull request #3858 from strongloop/feature/remove-model
• 0cd380c feat: remove all references to a Model
• 77a3523 3.18.3

See the full diff

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