where highlighted as keyword even when it's a normal variable

[non-Jedi]

where = 5

The above is valid julia code that assigns the value 5 to the variable where. It's fontified as if where is a keyword though. Test case that can be added once this is fixed:

(let ((s1 "where =  t")
        (s2 "x = :where"))
    (julia--should-font-lock s2 6 'julia-quoted-symbol-face)
    (julia--should-font-lock s1 1 nil))

As far a I can tell, where is the only keyword that behaves this way (since it's only a keyword in certain contexts. Perhaps it should instead by font-locked a part of the function-call regexps?