Better naming

Tests/UnitsTests/UnitsTests.swift

@@ -0,0 +1,10 @@
+import Testing
+
+@testable import Units
+
+@Test func example() async throws {
+	// Write your test here and use APIs like `#expect(...)` to check expected conditions.
+	if let tenKilos = 10["kg"] {
+		print(tenKilos[tenKilos.unit]!)
+	}
+}