Support placeholders in style config options.

[sigurdo]

Also increases the version number to a new minor version, since there are new features that might something.

I used #104 for reference implementation.

[sigurdo]

I'm sorry that my message appeared very disrespectful, especially considering that I just started using this extension and am completely new to the project. I also have generally very little knowledge of developing vscode extensions.

However, in my case, I store my clang-format style in a file style.clang-format at a location clang-format is not able to detect automatically. I therefore have to configure "clang-format.style" in .vscode/settings.json as "file:/absolute/path/to/style.clang-format". I think it would make sense to commit this to the git repo, but then I would prefer writing "file:${workspaceFolder}/path/to/style.clang-format", so that works on other computers. This is what my PR aims to support.

If you think the code is unproperly written for the extension, I would love to get feedback and will see if I can improve it.

[TheAlbertDev]

This functionality is critical and it is very important that it is merged. Thank you @sigurdo 🙌🏻

[troyliu0105]

Is this project dead?