Update eslint-plugin-node

[efueger]

Description

Repo using eslint-4 channel running into the following error:

engine eslint failed with status 1 and stderr 
/usr/src/app/lib/validate_config.js:18
        throw e;
        ^

Error: /code/.eslintrc.js:
	Configuration for rule "node/no-unsupported-features" is invalid:
	Value {"version":8.3,"ignores":[]} should be equal to one of the allowed values.
	Value {"version":8.3,"ignores":[]} should be string.
	Value 8.3 should be equal to one of the allowed values.
	Value 8.3 should be string.
	Value 8.3 should match some schema in anyOf.
	Value {"version":8.3,"ignores":[]} should match some schema in anyOf.

---

This is likely related to:

• the version of eslint-plugin-node the engine currently supports: 5.1.1.
• eslint-plugin-node made changes for for no-unsupported-features in 6.0.0 and 6.0.1.

---

User notes the following when testing:

Works:

'node/no-unsupported-features': [ 
'error', 
{ 
version: 8, 
ignores: [], 
}, 
],

Breaks:

'node/no-unsupported-features': [ 
'error', 
{ 
version: 8.3, 
ignores: [], 
}, 
],

[filipesperandio]

Already there, closing.