fix(deps): upgrade core version to address jsonwebtoken vulnerability

[jeff-arn]

@apaparazzi0329 also can you update the Readme in this PR to correct what the minimum version of node is?

[watson-github-bot]

:tada: This PR is included in version 7.2.0 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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[watson-github-bot]

:tada: This PR is included in version 8.0.0 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot :package::rocket: