chore: update giget-core to v0.1.6

Update giget-core as its dependencies have been updated and its binary size has been reduced. main branch: ```sh $ bun build ./src/index.ts --outfile=./bin --target=node --format=esm --banner='#!/usr/bin/env node' Bundled 115 modules in 155ms bin 0.39 MB (entry point) ``` This PR: ```sh $ bun build ./src/index.ts --outfile=./bin --target=node --format=esm --banner='#!/usr/bin/env node' Bundled 75 modules in 22ms bin 237.68 KB (entry point) ```