new icon : Stimulus (plain)

[Mathias-nextech]

Double check these details before you open a PR

• [x] PR does not match another non-stale PR currently opened
• [x] PR name matches the format new icon: Icon name (versions separated by comma). More details here
• [x] PR's base is the develop branch.
• [x] Your icons are inside a folder as seen here
• [x] SVG matches the standards laid out here
• [x] A new object is added in the devicon.json file at the correct alphabetic position as seen here

This PR closes NONE

Link to prove your SVG is correct and up-to-date.

Stimulus

[Mathias-nextech]

What do you want me to do ? Add the wordmark version in this pull request ?

[weh]

What do you want me to do ? Add the wordmark version in this pull request ?

Yes, just add it in this PR as stimulus-original-wordmark.svg and update the devicon.json file accordingly