[lsp-server] Add support for parsing typescript files with "explicitResourceManagement"

[ozzyonfire]

Currently, the language server is unable to parse .ts files with the "using" keyword.

I think we just need to enable the babel plugin for "explicitResourceManagement".

Receiving an error:

[Info  - 11:39:20 AM] SyntaxError: This experimental syntax requires enabling the parser plugin: "explicitResourceManagement". (411:2)

I can try to submit a PR if I can get a chance.