use correct 0.5 dev version in README

[stevengj]

You should check for the version where JuliaLang/julia#13062 was merged.

[IainNZ]

Why?

[stevengj]

Because the code is not correct for all 0.5-dev versions? Of course, as a practical matter, not many people are likely to use a version where the difference matters. It's more the general principle that VERSION >= v"X.Y-" checks should be viewed as automatically suspect.

[tkelman]

Bump. I'm going to merge this. Helps if this code ever needs to be used in bisecting something. @stevengj want an invite to the JuliaCI org?

[stevengj]

Sure.