vendor dependencies with dep

vendor/github.com/andybalholm/cascadia/fuzz/fuzz.go

@@ -0,0 +1,15 @@
+package fuzz
+
+import "github.com/andybalholm/cascadia"
+
+// Fuzz is the entrypoint used by the go-fuzz framework
+func Fuzz(data []byte) int {
+	sel, err := cascadia.Compile(string(data))
+	if err != nil {
+		if sel != nil {
+			panic("sel != nil on error")
+		}
+		return 0
+	}
+	return 1
+}