These macros are used in ~10 files (autoUpdater, localInstaller,
nativeInstaller, update CLI) but were not defined in the build script's
`define` block. At runtime, they resolve to `undefined`, causing
commands like `npm install undefined` and `npm view undefined` to fail
silently during auto-update checks.
Sets MACRO.PACKAGE_URL to the published npm package name and
MACRO.NATIVE_PACKAGE_URL to undefined (no native binary distribution).
Relates to #29
Co-Authored-By: Juan Camilo <juancamilo.auriti@gmail.com>
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