[Request] add .c3 in highlight.js

[codehangen]

Is your request related to a specific problem you're having? I would like highlightjs to have c3 language support.

The solution you'd prefer / feature you'd like to see added...

C3:
  type: programming
  color: "#555555"
  extensions:
  - ".c3"
  - ".c3t"
  tm_scope: source.c3

Any alternative solutions you considered... I thought I'd consult the highlightjs community to check the community's possibility to help me create the c3 hightling syntax in highlight.js.

Additional context...

• http://www.c3-lang.org/