Doesn't support comments in json

[jasonbeach]

I know json by definition doesn't support comments, however vscode allows them in its config files. Would be nice if those comments didn't break this extension but they appear to. When I add this:

	"extensions": {
	// See http://go.microsoft.com/fwlink/?LinkId=827846 to learn about workspace recommendations.
	// Extension identifier format: ${publisher}.${name}. Example: vscode.csharp
	// List of extensions which should be recommended for users of this workspace.
	"recommendations": [
		"ms-python.python",
		"ms-vscode.cpptools",
		"llvm-vs-code-extensions.vscode-clangd",
		"twxs.cmake",
		"bbenoist.doxygen",
		"cschlosser.doxdocgen",
		"eamodio.gitlens",
		"mhutchie.git-graph",
		"ms-azuretools.vscode-docker"
	]

to a code-workspace file that otherwise works, I get the following error when trying to sort folders:

Expected end of input but "." found.