Changelog for 0.6.0

[sushantdhiman]

My builds are failing with errors like this

Error: Cannot find module 'core-js-pure/stable/instance/reduce-right.js'
Require stack:
- node_modules/found/cjs/ElementsRenderer.js
- node_modules/found/cjs/createRender.js
- node_modules/found/cjs/createBaseRouter.js
- node_modules/found/cjs/index.js

It would be great to have some formal changelog available in this repository.

[sushantdhiman]

Closing in favor of #987