feat(codeblock): add 'wrap' option

[curbengh]

What does it do?

Continuation of #3827

How to test

git clone -b codeblock-wrap https://github.com/curbengh/hexo.git
cd hexo
npm install
npm test

Pull request tasks

• Add test cases for the changes.
• Passed the CI test.

[coveralls]

Coverage increased (+0.005%) to 97.148% when pulling e77a137 on curbengh:codeblock-wrap into 6fa7ada on hexojs:master.

[coveralls]

Coverage increased (+0.005%) to 97.148% when pulling 4430f2a on curbengh:codeblock-wrap into 6fa7ada on hexojs:master.

[seaoak]

@curbengh Thank you for following conversation in #3827.
The code looks good but there are two questions about the document of the parameters:

1. Could you add the document for the wrap parameter?
2. I can not understand the last line of the document of parameters (returns {Boolean} True if the link doesn't ...)

[curbengh]

1. Could you add the document for the wrap parameter?

Done, meanwhile I will also update hexo.io

I can not understand the last line of the document of parameters

That was an error because I simply copy-pasted from isExternalLink().

[seaoak]

LGTM 👍