Hints in logs about auto-fixable rules

[zmeyc]

I've noticed that there are a lot of hints about using "error" for auto-fixable rules on each formatting operation.
But these rules are errors by default in ESLint and are not being overridden in .eslintrc.json.

It's possible to add all of them to eslintrc as warnings, but there are downsides:

• .eslintrc.json will no longer be tidy and will list all possible ESLint rules.
• it will require continuous updates as new rules will appear in new ESLint versions.
• CI usually only lints code and can't autofix it, so treating some of the rules (even auto-fixable) as errors is correct behavior imo. Workarounds like passing max-warnings=0 are possible, but they are hacks. Plus it won't be possible to keep some less important rules as warnings in this case.

My proposal is to silence these hints or possibly only output them once because it's easy to miss other errors because of them.

["INFO" - 7:05:05 PM] Hint: Rule "no-regex-spaces" is auto-fixable and need not be set to level error!
["INFO" - 7:05:05 PM] Hint: Rule "no-unused-labels" is auto-fixable and need not be set to level error!
...20 more