Update package metadata

[remcohaszing]

This adds the following metadata:

• description is rendered on https://npmjs.com
• homepage is rendered on https://npmjs.com
• funding renders a Fund button on https://npmjs.com and is used by the npm fund command
• bugs is used by the npm bugs command.
• sideEffects tells bundlers that importing the package does not have side effects, so it can be tree-shaken safely.
• keywords is rendered on https://npmjs.com
• I’m not really sure how author is used, but it’s nice to give the author credit, especially in case of external contributors.

[johnsoncodehk]

Thanks for sorting this out! Let's remove the "funding" field and simplify the "keyworks" field, then we can merge it.