Updates to track upstream feedkit v0.8.2

internal/sources/nws/observation_test.go

@@ -41,6 +41,9 @@ func TestObservationSourcePollReturnsNoEventsOn304(t *testing.T) {
 	if err != nil {
 		t.Fatalf("NewObservationSource() error = %v", err)
 	}
+	if got := src.Kinds(); len(got) != 1 || got[0] != event.Kind("observation") {
+		t.Fatalf("Kinds() = %#v, want [observation]", got)
+	}
 
 	first, err := src.Poll(context.Background())
 	if err != nil {