add support for markdown

[vinmaster]

Closes #20

[vinmaster]

The test passes locally, not sure why it returns as object

[aldy505]

please pull latest origin and change every assert.equal(code, 'Markdown') to assert.equal(code.language, 'Markdown')

[aldy505]

also can you please add more of a real-world markdown code? you can make your own or grab one online. thanks.

[vinmaster]

I've fixed the tests and added more. It's hard not to have conflict because markdown can catch comments of all the other languages

[codecov]

Codecov Report

Merging #50 (5cca8e9) into master (11e7a24) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master       #50   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           23        24    +1     
  Lines          852       880   +28     
  Branches        43        43           
=========================================
+ Hits           852       880   +28     

Impacted Files	Coverage Δ
src/index.ts	100.00% <100.00%> (ø)
src/languages/markdown.ts	100.00% <100.00%> (ø)

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[aldy505]

About the skipped tests, can you replace those with a working test cases?

Here's a few that I found on Github:

• https://raw.githubusercontent.com/markdown-it/markdown-it/master/CHANGELOG.md
• https://github.com/elianiva/elianiva.my.id/blob/master/src/routes/post/why-i-use-linux/index.svx
• https://raw.githubusercontent.com/marinaaisa/nuxt-markdown-blog-starter/master/contents/en/blog/blog-using-vue-nuxt-markdown.md

Thanks a lot

[vinmaster]

I've made the changes requested. Let me know if more work is needed. Thanks