Adding upstream version 0.28.1.

Signed-off-by: Daniel Baumann <daniel@debian.org>

plugins/ghupdate/release_test.go

@@ -0,0 +1,23 @@
+package ghupdate
+
+import "testing"
+
+func TestReleaseFindAssetBySuffix(t *testing.T) {
+	r := release{
+		Assets: []*releaseAsset{
+			{Name: "test1.zip", Id: 1},
+			{Name: "test2.zip", Id: 2},
+			{Name: "test22.zip", Id: 22},
+			{Name: "test3.zip", Id: 3},
+		},
+	}
+
+	asset, err := r.findAssetBySuffix("2.zip")
+	if err != nil {
+		t.Fatalf("Expected nil, got err: %v", err)
+	}
+
+	if asset.Id != 2 {
+		t.Fatalf("Expected asset with id %d, got %v", 2, asset)
+	}
+}