docs: update working node version

[vaibhavgarg237]

Describe the changes you have made in this PR

Updated working node version in Readme.md

Link this PR to an issue

Fixes #1588

Type of change

(Remove other not matching type)

• docs: Documentation update

Checklist

• My code follows the style guidelines of this project and performed a self-review of my own code
• New and existing tests pass locally with my changes
• I checked if I need to make corresponding changes to the documentation (and made those changes if needed)

[vaibhavgarg237]

Below were the results on running unit tests locally for these node versions

v14.0.0 - FAILED
v14.1.0 - FAILED
v14.2.0 - FAILED
v14.4.0 - FAILED
v14.5.0 - FAILED

v14.6.0 - PASSED    
v14.7.0 - PASSED    
v14.17.0 - PASSED    
v14.15.0 - PASSED    
v14.20.1 - PASSED
v15.0.0 - PASSED
v15.14.0 - PASSED
v16.00.0 - PASSED

v16.17.1 - FAILED

[github-actions]

🚀 Thanks for the pull request!

Here are the current build files for testing:

• chrome.zip.zip
• firefox.xpi.zip
• opera.crx.zip

Download and unzip the file for your browser. Refer to the readme for detailed install instructions.

Don't forget: keep stacking sats!