Added .nyc_output to .npmignore

[amilajack]

What kind of change does this PR introduce?
build related change

Did you add tests for your changes?
no

If relevant, did you update the documentation?

Summary
Flow fails when parsing the node_modules/webpack-cli

Does this PR introduce a breaking change?
no

[jsf-clabot]

All committers have signed the CLA.

[webpack-bot]

@amilajack Please review the following output log for errors:

> [email protected] travis:integration /home/travis/build/webpack/webpack-cli
> nyc jest && npm run reportCoverage

 PASS  lib/utils/ast-utils.test.js (18.345s)
 PASS  lib/init/transformations/watch/watchOptions.test.js (25.409s)
 PASS  lib/init/transformations/module/module.test.js (27.201s)
 PASS  lib/utils/is-local-path.test.js (15.443s)
 PASS  lib/migrate/uglifyJsPlugin/uglifyJsPlugin.test.js
 PASS  lib/migrate/bannerPlugin/bannerPlugin.test.js
 PASS  lib/utils/resolve-packages.test.js (21.84s)
 PASS  lib/init/transformations/top-scope/top-scope.test.js (14.888s)
 PASS  lib/utils/npm-exists.test.js (21.887s)
 PASS  lib/migrate/resolve/resolve.test.js (7.637s)
 PASS  lib/migrate/extractTextPlugin/extractTextPlugin.test.js (8.716s)
 PASS  lib/utils/package-manager.test.js (30.503s)
 PASS  lib/init/transformations/watch/watch.test.js (32.121s)
 PASS  lib/migrate/outputPath/outputPath.test.js (18.958s)
 PASS  lib/init/transformations/node/node.test.js (31.746s)
 PASS  lib/init/transformations/entry/entry.test.js (35.951s)
 PASS  lib/init/transformations/externals/externals.test.js (36.666s)
 PASS  lib/migrate/removeJsonLoader/removeJsonLoader.test.js (34.499s)
 PASS  lib/init/transformations/target/target.test.js (36.09s)
 PASS  lib/init/transformations/stats/stats.test.js (40.517s)
 PASS  lib/init/transformations/devtool/devtool.test.js (38.292s)
 PASS  lib/init/transformations/context/context.test.js (37.303s)
 PASS  lib/migrate/loaderOptionsPlugin/loaderOptionsPlugin.test.js (36.865s)
 PASS  lib/init/transformations/mode/mode.test.js (37.286s)
 PASS  lib/init/transformations/resolveLoader/resolveLoader.test.js (38.337s)
 PASS  lib/init/transformations/performance/performance.test.js (39.562s)
 PASS  lib/init/transformations/plugins/plugins.test.js (38.742s)
 PASS  lib/init/transformations/resolve/resolve.test.js (40.678s)
 PASS  lib/init/transformations/devServer/devServer.test.js (40.385s)
 PASS  lib/init/transformations/output/output.test.js (40.51s)
 PASS  lib/migrate/removeDeprecatedPlugins/removeDeprecatedPlugins.test.js (39.314s)
  ● Console

    console.log lib/migrate/removeDeprecatedPlugins/removeDeprecatedPlugins.js:37
      
      Please remove deprecated plugins manually. 
      See https://webpack.js.org/guides/migrating/ for more information.
    console.log lib/migrate/removeDeprecatedPlugins/removeDeprecatedPlugins.js:37
      
      Please remove deprecated plugins manually. 
      See https://webpack.js.org/guides/migrating/ for more information.
    console.log lib/migrate/removeDeprecatedPlugins/removeDeprecatedPlugins.js:37
      
      Please remove deprecated plugins manually. 
      See https://webpack.js.org/guides/migrating/ for more information.

 PASS  lib/generators/loader-generator.test.js (40.267s)
 PASS  lib/migrate/index.test.js (42.399s)
 PASS  lib/migrate/loaders/loaders.test.js (40.766s)
 PASS  lib/init/transformations/other/other.test.js (43.478s)
 PASS  lib/utils/npm-packages-exists.test.js (54.989s)
 PASS  test/BinTestCases.test.js (212.799s)
�[999D�[K
=============================== Coverage summary ===============================
Statements   : 77.18% ( 1265/1639 )
Branches     : 62.15% ( 509/819 )
Functions    : 75.42% ( 313/415 )
Lines        : 77.16% ( 1253/1624 )
===

See complete report here.

[evenstensberg]

Hi, thanks for the PR @amilajack ! Could you add other misc stuff to this as well? Like the jsdoc.json, MIGRATE.MD and everything that isn't compiled source code? Thanks!

[evenstensberg]

Closing in favor for #349 . Thanks for the PR! Can I grab you another issue?