Don't output startup info if quiet is set to true

[larsbs]

What kind of change does this PR introduce?
Use quiet option to decide if webpack should print startup info or not.

Did you add or update the examples/?
No

Summary
As stated by @jonathanconway in webpack/webpack#1191 there's no way to fully disable all logs. Also, I've been investigating and didn't find where the noInfo option is used so I decided to use it to disable the startup info.

Does this PR introduce a breaking change?
No

Other information

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All committers have signed the CLA.

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Codecov Report

Merging #970 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #970   +/-   ##
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  Coverage   72.13%   72.13%           
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  Files           4        4           
  Lines         463      463           
  Branches      139      139           
=======================================
  Hits          334      334           
  Misses        129      129

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[shellscape]

we've already got the quiet option, and it's apparently supposed to do what you're attempting to do with noInfo see:

webpack-dev-server/lib/optionsSchema.json

Line 290 in 7b3a42a

"quiet": {

I'd say use that option here instead.

[larsbs]

@shellscape but then the noInfo option is useless again. At least when I've searched for it in the code is used nowhere. For me it's ok, I can change the code to use quiet, but why keep an unused option around?

[shellscape]

It might be there for legacy reasons, not entirely sure.