Use jsx-uses-inferno eslint rule

[jstrangfeld]

eslint-plugin-inferno provides better eslint rules than the default configuration. In particular, eslint gives the following warning with every component: 'Inferno' is defined but never used (no-unused-vars)

There are two solutions:

1. Use .eslintrc configuration from the project root, if present. Currently, custom .eslintrc files are ignored. Allow developers to customize eslint using their own configuration.

2. Add eslint-plugin-inferno as a project dependency and configure eslint to use it automatically. This would change the default rules for everyone without giving an option to modify them.

[Havunen]

Hi @jstrangfeld can you send PR for this?

[jstrangfeld]

I dug into this more and it looks like the rule I am requesting is not enabled by default. I will submit a pull request.

[Havunen]

Wait a minute, I might have misunderstood something here. This error is valid:
'Inferno' is defined but never used (no-unused-vars)
because after v4 babel plugin can import what it needs and you dont need import Inferno from 'inferno'

[jstrangfeld]

Closed in #63