Log Message:
Update to 0.006

Upstream changes:
0.006           2018-07-09      T. R. Wyant
    Only standalone graphemes and non-characters allowed as delimiters
    starting with Perl 5.29.0.

    Non-ASCII delimiters started working in 5.8.3, so that is what
    perl_version_introduced() returns for them.

    Collateral with all this, accept word characters as delimiters, but
    only with at least one space between the operator and the expression
    -- that is, 'qq xyx' is OK, but 'qqxyx' is not.