Describe the bug

A clear and concise description of what the bug is.

when using deco update, the command assumes the global install to update uses npm. This is wrong, it could be using bun, for example.

To Reproduce

Steps to reproduce the behavior:

1. Install deco-cli with bun bun i -g deco-cli in an old version
2. Run deco update to download and install latest version (the program will use npm)
3. Now when you run deco --version you still are using the bun one, which is on the old version.

Expected behavior

The CLI should detect what package manager is being used when self-updating.

Environment

• OS: macOS