Coinmarketcap parser

[bchamagne]

Description

Some UI changes on CoinMarketCap requires a new parser.
Also write the html in /tmp/ when we fails to parse.
Fixes #1139

• Lint: use plug

Type of change

• bug fix

How Has This Been Tested?

tested manually by overriding the body with the problematic one
tested if all extract_fn fails

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules