Key followed by tab not parsed

[jaakkor2]

On Julia 1.8.3 and 1.9.0-rc3

import TOML
TOML.parse("foo\t=1")

gives

ERROR: TOML Parser error:
none:1:4 error: invalid bare key character: '\t'
  foo   =1
     ^
Stacktrace:
 [1] parse
   @ ./toml_parser.jl:441 [inlined]
 [2] parse(str::String)
   @ TOML /opt/julias/julia-1.8.3/share/julia/stdlib/v1.8/TOML/src/TOML.jl:71
 [3] top-level scope
   @ REPL[2]:1

This is fine

TOML.parse("\tfoo \t=\t1")

The spec https://toml.io/en/v1.0.0 says

Whitespace means tab (0x09) or space (0x20).

and

Keys are on the left of the equals sign and values are on the right. Whitespace is ignored around key names and values.

https://www.toml-lint.com/ seems to accept tab right after the key.