fix: TypeError in `HexBytes.new` if called from subclass #10

Performance Gate Passed

⚡ 29 improvements
✅ 590 untouched

	Benchmark	`BASE`	`HEAD`	Change
⚡	`test_faster_hexbytes_repr[0-9]`	266.3 µs	98.6 µs	×2.7
⚡	`test_faster_hexbytes_repr[4-byte pattern]`	691.9 µs	245.7 µs	×2.8
⚡	`test_faster_hexbytes_repr[all byte values]`	692.2 µs	245.7 µs	×2.8
⚡	`test_faster_hexbytes_repr[alternating 0x00/0xff]`	360.1 µs	130.7 µs	×2.8
⚡	`test_faster_hexbytes_repr[alternating 0xaa/0x55]`	360.2 µs	130.7 µs	×2.8
⚡	`test_faster_hexbytes_repr[ascii sentence]`	323.7 µs	118.4 µs	×2.7
⚡	`test_faster_hexbytes_repr[b'']`	213.1 µs	80.8 µs	×2.6
⚡	`test_faster_hexbytes_repr[b'\\x00'*32]`	304.4 µs	111.6 µs	×2.7
⚡	`test_faster_hexbytes_repr[b'\\x00\\xff\\x00\\xff']`	256 µs	95.1 µs	×2.7
⚡	`test_faster_hexbytes_repr[b'\\x01'*100]`	421.9 µs	152.3 µs	×2.8
⚡	`test_faster_hexbytes_repr[b'\\x01'*2048]`	3.8 ms	1.3 ms	×2.9
⚡	`test_faster_hexbytes_repr[b'\\x01\\x02\\x03']`	254.6 µs	94.5 µs	×2.7
⚡	`test_faster_hexbytes_repr[b'\\x10\\x20\\x30\\x40\\x50']`	257.9 µs	95.7 µs	×2.7
⚡	`test_faster_hexbytes_repr[b'\\x7f'*8]`	263 µs	97.4 µs	×2.7
⚡	`test_faster_hexbytes_repr[b'\\x80'*8]`	262.8 µs	97.5 µs	×2.7
⚡	`test_faster_hexbytes_repr[b'\\xde\\xad\\xbe\\xef']`	256.3 µs	95.1 µs	×2.7
⚡	`test_faster_hexbytes_repr[b'\\xff'*64]`	360.1 µs	130.7 µs	×2.8
⚡	`test_faster_hexbytes_repr[b'a'*1024]`	2,056.8 µs	720.6 µs	×2.9
⚡	`test_faster_hexbytes_repr[b'abc']`	254.6 µs	94.5 µs	×2.7
⚡	`test_faster_hexbytes_repr[long alternating]`	2,056.9 µs	719.9 µs	×2.9
...	...	...	...	...

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