Migrate to marksy@6

[Hypnosphi]

Fixes #2207 and fixes #2461

How to test

Open markdown example, click "Show info"

[codecov]

Codecov Report

Merging #2464 into release/3.3 will increase coverage by 75.81%.
The diff coverage is n/a.

@@               Coverage Diff               @@
##           release/3.3   #2464       +/-   ##
===============================================
+ Coverage        19.18%     95%   +75.81%     
===============================================
  Files              355       6      -349     
  Lines             8252      40     -8212     
  Branches           917       2      -915     
===============================================
- Hits              1583      38     -1545     
+ Misses            5972       1     -5971     
+ Partials           697       1      -696

Impacted Files	Coverage Δ
addons/info/src/components/types/Signature.js
addons/knobs/src/components/types/index.js
addons/viewport/src/index.js
...rganisation-name/update-organisation-name.input.js
...react/src/server/config/defaults/webpack.config.js
app/angular/bin/index.js
...-native/src/preview/components/OnDeviceUI/style.js
...dons/storyshots/stories/directly_required/index.js
app/angular/src/client/preview/actions.js
...modules/ui/components/stories_panel/text_filter.js
... and 336 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 2f9ce07...a49d221. Read the comment docs.

[eur00t]

For those people who used marksyConf: { highlight: ... } before: you can make this work with prismjs. Built-in storybook's <Code> component, which is given to marksy, check if Prism is available globally and then applies it.
Just add this to your storybook config:

import 'prismjs';
import 'prismjs/components/prism-<language you need>';
import 'prismjs/themes/prism.css';