Support for older VSCode version (1.69.2)

[dabell-cc]

Issue: First attempt to use CodeViz, page stays blank except title and dropdown box. Error message appears in VSCode notifications.

Error message:
Vizzu library import failure: TypeError: Failed to fetch dynamically imported module: https://cdn.jsdelivr.net/npm/vizzu@~0.4.0/dist/vizzu.min.js

Environment:
VSCode 1.69.2 (can't update past this on Ubuntu14.04LTS).

Does load in VSCode 1.75.1(Windows10), however has animation issue (will open separate issue for that).