[VSCode 1.38.1] Deprecated workspace.rootPath

[umarcor]

Quite a while ago, we added support for multi-root workspaces and deprecated the API workspace.rootPath in favor of workspace.workspaceFolders and workspace.getWorkspaceFolder. We have noticed that many extensions still use this API, even though it won't work properly in multi-root workspaces. If you own an extension that uses this API, please update it as we may want to get rid of this API in the future. You can find more details about moving away from rootPath on the Adopting-Multi-Root-Workspace-APIs wiki page.

https://github.com/microsoft/vscode/wiki/Adopting-Multi-Root-Workspace-APIs#eliminating-rootpath