Simplify repository config
Simplify repository config

Since this project is hosted on GitHub we can use the shorthand repository configuration.

https://docs.npmjs.com/files/package.json#repository
dhowe/p5.js,limzykenneth/p5.js,bomoko/p5.js,joecridge/p5.js,mlarghydracept/p5.js,limzykenneth/p5.js,dhowe/p5.js,bomoko/p5.js,processing/p5.js,joecridge/p5.js,processing/p5.js,mlarghydracept/p5.js