Import howett.net/plist by its correct name

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

vendor/howett.net/plist/text_tables.go

@@ -0,0 +1,43 @@
+package plist
+
+type characterSet [4]uint64
+
+func (s *characterSet) Contains(ch rune) bool {
+	return ch >= 0 && ch <= 255 && s.ContainsByte(byte(ch))
+}
+
+func (s *characterSet) ContainsByte(ch byte) bool {
+	return (s[ch/64]&(1<<(ch%64)) > 0)
+}
+
+// Bitmap of characters that must be inside a quoted string
+// when written to an old-style property list
+// Low bits represent lower characters, and each uint64 represents 64 characters.
+var gsQuotable = characterSet{
+	0x78001385ffffffff,
+	0xa800000138000000,
+	0xffffffffffffffff,
+	0xffffffffffffffff,
+}
+
+// 7f instead of 3f in the top line: CFOldStylePlist.c says . is valid, but they quote it.
+var osQuotable = characterSet{
+	0xf4007f6fffffffff,
+	0xf8000001f8000001,
+	0xffffffffffffffff,
+	0xffffffffffffffff,
+}
+
+var whitespace = characterSet{
+	0x0000000100003f00,
+	0x0000000000000000,
+	0x0000000000000000,
+	0x0000000000000000,
+}
+
+var newlineCharacterSet = characterSet{
+	0x0000000000002400,
+	0x0000000000000000,
+	0x0000000000000000,
+	0x0000000000000000,
+}