Add support for configuration in `package.json`#77

Draft

gadhagod wants to merge 5 commits intotbroadley:masterfrom

gadhagod:master

Commits on Jun 17, 2021

Add support for configuration in `package.json`
gadhagod
committed

Commits on Jun 18, 2021

Commits on Jun 20, 2021

Print all errors in package.json configuration
gadhagod
committed
Use package.json from `test/fixtures/config/package.json` in `package.json\ configuration test`
gadhagod
committed