libraries aren't sorted correctly in the latest pkg:googleapis

[kevmoo]

Compare the left library list in

https://pub.dev/documentation/googleapis/11.4.0/
https://pub.dev/documentation/googleapis/12.0.0/
https://pub.dev/documentation/googleapis/13.1.0/

The 13.1.0 are sorted incorrectly. I'm guessing it's due to the name being blank in all of these so we're just sorting on the hashcode, which ends up being...random?

dartdoc/lib/src/model/nameable.dart

Lines 97 to 104 in 28d0dab

	/// Compares [a] with [b] by name.
	int byName(Nameable a, Nameable b) {
	var stringCompare = compareAsciiLowerCaseNatural(a.name, b.name);
	if (stringCompare == 0) {
	return a.hashCode.compareTo(b.hashCode);
	}
	return stringCompare;
	}

[srawlins]

I think I fixed this, but I don't know when. They looks sorted well in the latest docs.