fix eslint issues

[adonespitogo]

When I first forked the repo and run test, I get this minor errors:

[adonesp@archlinux mocha-webpack]$ npm run lint

> mocha-webpack@1.1.0 lint /home/adonesp/Projects/mocha-webpack
> eslint src test bin


/home/adonesp/Projects/mocha-webpack/src/MochaWebpack.js
  29:35  error  Block must not be padded by blank lines  padded-blocks

/home/adonesp/Projects/mocha-webpack/src/runner/TestRunner.js
  37:54  error  Block must not be padded by blank lines  padded-blocks

/home/adonesp/Projects/mocha-webpack/src/runner/testRunnerReporter.js
  24:16  error  Block must not be padded by blank lines  padded-blocks

/home/adonesp/Projects/mocha-webpack/src/util/glob.js
  13:1  error  Expected indentation of 0 spaces but found 2  indent

/home/adonesp/Projects/mocha-webpack/src/webpack/loader/entryLoader.js
   6:19  error  Block must not be padded by blank lines  padded-blocks
  28:1   error  Block must not be padded by blank lines  padded-blocks

/home/adonesp/Projects/mocha-webpack/src/webpack/util/getAffectedModuleIds.js
  19:34  error  Multiple spaces found before '// eslint-disa...'  no-multi-spaces

/home/adonesp/Projects/mocha-webpack/src/webpack/util/getBuildStats.js
  36:1  error  Expected indentation of 6 spaces but found 8  indent

✖ 8 problems (8 errors, 0 warnings)
  8 errors, 0 warnings potentially fixable with the `--fix` option.

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! mocha-webpack@1.1.0 lint: `eslint src test bin`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the mocha-webpack@1.1.0 lint script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/adonesp/.npm/_logs/2018-03-18T14_38_17_941Z-debug.log

Upgraded eslint and babel-eslint to fix eslint/eslint#2224
as suggested at babel/babel-eslint#487 (comment)

[codecov-io]

Codecov Report

Merging #212 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff           @@
##           master    #212   +/-   ##
======================================
  Coverage    96.8%   96.8%           
======================================
  Files          28      28           
  Lines         751     751           
======================================
  Hits          727     727           
  Misses         24      24

Impacted Files	Coverage Δ
src/runner/TestRunner.js	100% <ø> (ø)	⬆️
src/MochaWebpack.js	100% <ø> (ø)	⬆️
src/runner/testRunnerReporter.js	95.45% <ø> (ø)	⬆️
src/webpack/loader/entryLoader.js	100% <ø> (ø)	⬆️
src/util/glob.js	100% <100%> (ø)	⬆️
src/webpack/util/getBuildStats.js	100% <100%> (ø)	⬆️
src/webpack/util/getAffectedModuleIds.js	100% <100%> (ø)	⬆️

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[zinserjan]

Thanks for working on this!
Unfortunately @astorije fixed the eslint issues already on another branch. That's why I'm gonna close this one.