Interpret byte sequence as ASCII codepoints. Only available when
building with text-2.0 and newer. Returns Nothing if
any of the bytes are outside of the range 0x00-0x7F
Attempt to interpret byte sequence as UTF-8 encoded
Text. Only available when building with text-2.1 and
newer. Since Text is backed by a UTF-8 byte sequence, this does
not perform a copy.