Add more variations, or use standard codes

[SaadBazaz]

Hey, great repo.
Would love to have variations of the name. For example, I autoget these icons based on a Language field I have in my frontend. I lowercase it as such to get the icon:

  const languageCode = language
    .replaceAll(" ", "-")
    .toLowerCase()
  console.log("languageCode", languageCode)

  const src = `https://github.com/get-icon/geticon/raw/master/icons/${languageCode}.svg`

In there, I have "C++", which translates to "https://github.com/get-icon/geticon/raw/master/icons/c++.svg", which doesn't exist. Instead, it's called c-plusplus.svg.

It'd be nice to have standardization or duplication. i.e. keep both c-plusplus, c++.svg, and cplusplus.svg at the same level.