Exclude non-production files in the published package

[Deleted user]

Is your feature request related to a problem? Please describe.

Currently, the published packages contain non-production files e.g. test files which is not optimal.

You can use npm publish --dry-run to test it.

npm notice package size:  1.5 MB                                  
npm notice unpacked size: 5.3 MB                                  
npm notice shasum:        8db0918e89b65e23aba81c3047f3b83a3b700556
npm notice integrity:     sha512-wbP+UrDG7zCXb[...]w98Xrt+sclRfw==
npm notice total files:   495  

Describe the solution you'd like
A clear and concise description of what you want to happen.

• whitelist relavant files using https://docs.npmjs.com/cli/v7/configuring-npm/package-json#files

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

• blacklist irrelevant files using .npmignore

Additional context
Add any other context or screenshots about the feature request here.