[Snyk] Security upgrade newman from 3.10.0 to 4.2.0

[kamalaknn]

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:
  • package.json

Vulnerabilities that will be fixed

With an upgrade:

Severity	Priority Score (*)	Issue	Breaking Change	Exploit Maturity
	673/1000 Why? Proof of Concept exploit, Recently disclosed, Has a fix available, CVSS 5.6	Remote Code Execution (RCE) SNYK-JS-HANDLEBARS-1056767	Yes	Proof of Concept

(*) Note that the real score may have changed since the PR was raised.

Commit messages

Package name: newman

The new version differs by 250 commits.

• 651454f Merge branch 'release/4.2.0'
• cafc08a Released v4.2.0
• 0cb1053 Merge pull request #1778 from postmanlabs/greenkeeper/nock-10.0.2
• 48b070d Merge pull request #1776 from postmanlabs/feature/docker-image-improvements
• dad8fb9 chore(package): update nock to version 10.0.2
• b1a2233 Updated Docker lint rules 👕
• 5dd5719 Cleaned up Alpine Docker image 🎨
• 98b4ba4 Corrected invalid references in Docker documentation 🐳
• fcc291f Updated postpublish script to account for postman/newman
• 973f4c2 Updated Node version on Ubuntu images to v10 ⬆️
• 6e6957b Updated Node version on Alpine images to v10 ⬆️
• b08d397 Merge pull request #1770 from pavanteja-potnuru/feature/travis-windows
• 12e9892 Merge branch 'develop' into feature/travis-windows
• 9b01c3a remove system tests for appveyor
• 7682ca9 Delete .appveyor.yml
• 6760f53 Travis: add windows os
• 2438055 Merge pull request #1769 from pavanteja-potnuru/feature/gitattributes
• a8e37db Merge branch 'develop' into feature/gitattributes
• 0207fc3 add system test for gitattributes
• 1b15ebc add gitatrributes
• a62a8d8 Merge pull request #1767 from bharathr145/feature/docker-images-os-agnostic
• 0108749 Add exact image names to docker/README.md
• 32cbbb0 Add exact image names to docker/README.md
• 393d03b Merge branch 'feature/docker-images-os-agnostic' of https://github.com/bharathr145/newman into feature/docker-images-os-agnostic

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