The encoding/json package marshals []byte to a JSON string containing the base64 encoding of the
input slice's bytes, and unmarshals JSON strings to []byte by assuming the JSON string contains a
valid base64 text.
As a binary format, CBOR is capable of representing arbitrary byte sequences without converting them
to a text encoding, but it also needs to interoperate with the existing JSON serializer. It does
this using the "expected later encoding" tags defined in RFC 8949, which indicate a specific text
encoding to be used when interoperating with text-based protocols. The actual conversion to or from
a text encoding is deferred until necessary, so no conversion is performed during roundtrips of
[]byte to CBOR.
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