docs: add node.js and npm to README.md

[tinatinz]

Description

• Wrote in 'Develop' section that the latest version of Node.js and npm are required

Related issue(s) Fixes #427

[sonarcloud[bot]]

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[magicmatatjahu]

/rtm

[asyncapi-bot]

:tada: This PR is included in version 1.17.0-next-spec.1 :tada:

The release is available on:

• npm package (@next-spec dist-tag)
• GitHub release

Your semantic-release bot :package::rocket:

[asyncapi-bot]

:tada: This PR is included in version 1.17.0 :tada:

The release is available on:

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

Your semantic-release bot :package::rocket:

[smoya]

I noticed the right combo should be Node >=15, NPM >= 7., according to https://nodejs.org/en/download/releases/

I'm gonna open a PR fixing this.

[asyncapi-bot]

:tada: This PR is included in version 2.0.0-next-major.18 :tada:

The release is available on:

• npm package (@next-major dist-tag)
• GitHub release

Your semantic-release bot :package::rocket: