Upgrade to Julia 1.0+

[PallHaraldsson]

I'm looking into how to upgrade (this) package(s).

Error isn't too helpful:

julia> using LibTrading
[ Info: Precompiling LibTrading [b021d9d7-245e-532a-a546-77f8aa0d53ad]
ERROR: LoadError: syntax: extra token "FixSession" after end of expression
Stacktrace:

and [FYI, general issue] while I can find FixSession with search here, strangely search doesn't work at (even with the code the same, while "issues" tab gone, and "Actions" new):

https://github.com/JuliaQuant/LibTrading.jl