Fix colors for treesitter

[flamarique]

Some colours were wrong when using vscode.nvim along with nvim-treesitter.nvim

I have created a simple code snippet to illustrate the differences. This is how VSCode looks like:

And this is how vscode.nvim looks like:

The following colours have been changed:

• constants: from yellow to accent blue
• constructor: from blue-green to yellow (like class methods)
• attributes: from blue-green to yellow
• attributes.builtin: set to blue-green (new tag)

After the changes, here is the end result:

[flamarique]

Reverted the change for the constructor as it also affects the colour at the constructor call, which should be blue-green in VSCode

[flamarique]

Also fixed the punctuation brackets.

In VSCode:

In vscode.nvim:

After the change in vscode.nvim: