Prettier Configuration File Patterns

[dnlznk]

I added the module js file endings for all prettier configs and adjusted the prettier_eslint formatter pattern according to the prettier documentation.

[mochaaP]

I guess we could add a helper for cosmiconfig's config file pattern since many tool rely on this to load the configuration. What do you think about it?

[mochaaP]

Closed by 2d765eb

[dnlznk]

Yeah much better approach! Sorry for not replying, it was a busy week.

[mochaaP]

@g-plane is working on a refactor to detect fields in package.json.

Done: #67