Avoid truncation of large integers

[janfh]

Fixes #324

Alternative fix to avoid truncation. Requires node >= 21.

• Wait until VSCode with Electron 35 and node v22 is released
• Test changes

Update of Electron and Node can be tracked here:
https://redirect.github.com/microsoft/vscode/pull/245423

Background:

JSON.parse will parse integers to Number (IEEE 754 64-bit float) and is limited to values less than what might be returned from the server. This will cause truncation of values less than -9007199254740991 and greater than 9007199254740991 (Number.MAX_SAFE_INTEGER).