`"publish": "gitpkg publish"` calls itself recursively

From https://github.com/google/wireit/issues/273#issuecomment-1146144318:

had a little dig, its an infinite loop!
await execLifecycleScript('publish', this.pkg, pkgPath);

It looks like setting "publish": "gitpkg publish" in package.json causes gitpkg to call itself recursively. It will throw an error if run naked (because the second tag push will fail), but causes the wireit script runner to hang.

@ramasilveyra do you recall why this line is there? Can we safely remove it (or make it optional, or detect and abort the recursive invocation)?

ramasilveyra / gitpkg

`"publish": "gitpkg publish"` calls itself recursively #59