Import howett.net/plist by its correct name

Also bumping the version to one with a go.mod.

vendor/howett.net/plist/must.go

@@ -0,0 +1,50 @@
+package plist
+
+import (
+	"io"
+	"strconv"
+)
+
+type mustWriter struct {
+	io.Writer
+}
+
+func (w mustWriter) Write(p []byte) (int, error) {
+	n, err := w.Writer.Write(p)
+	if err != nil {
+		panic(err)
+	}
+	return n, nil
+}
+
+func mustParseInt(str string, base, bits int) int64 {
+	i, err := strconv.ParseInt(str, base, bits)
+	if err != nil {
+		panic(err)
+	}
+	return i
+}
+
+func mustParseUint(str string, base, bits int) uint64 {
+	i, err := strconv.ParseUint(str, base, bits)
+	if err != nil {
+		panic(err)
+	}
+	return i
+}
+
+func mustParseFloat(str string, bits int) float64 {
+	i, err := strconv.ParseFloat(str, bits)
+	if err != nil {
+		panic(err)
+	}
+	return i
+}
+
+func mustParseBool(str string) bool {
+	i, err := strconv.ParseBool(str)
+	if err != nil {
+		panic(err)
+	}
+	return i
+}