feat: replace minimatch with micromatch

[curbengh]

micromatch is a replacement of minimatch. It supports multiple patterns in an array, without the need of string-to-array conversion, along with other globbing features.

Depends on Node 8 or above.

More details: hexojs/hexo#3538

[codecov]

Codecov Report

Merging #83 into master will decrease coverage by 0.17%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #83      +/-   ##
==========================================
- Coverage   94.73%   94.56%   -0.18%     
==========================================
  Files           5        5              
  Lines         190      184       -6     
==========================================
- Hits          180      174       -6     
  Misses         10       10

Impacted Files	Coverage Δ
lib/concatJS.js	97.4% <ø> (ø)	⬆️
lib/optimizeCSS.js	100% <100%> (ø)	⬆️
lib/optimizeHTML.js	77.27% <100%> (-1.9%)	⬇️
lib/optimizeImage.js	97.14% <100%> (ø)	⬆️
lib/optimizeJS.js	90.9% <100%> (-0.76%)	⬇️

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[curbengh]

matchBase/basename option in micromatch only works with globbing pattern without slashes (e.g. '*.min.js'), so pattern like 'src/**/*' would only works when "basename" option is disabled.

One way to work around it is to let user customize the micromatch option,
see lint-staged/lint-staged#179
https://github.com/curbengh/hexo-yam/blob/7d06de7e7920b536083f4b5e9b93375ee57ea120/lib/filter.js#L27-L30

Alternatively, we could also detect whether the pattern contains a slash and disable "basename" accordingly.

[chenzhutian]

hey there are some conflicts, can you please have a see?
Also, can you update the readme for using micromatch?