GAP.jl 0.7.5 released

Today GAP.jl 0.7.5 has been released.

Diff since v0.7.4

Closed issues:

• intended behavior of ConvertedToJulia? (#94)

Merged pull requests:

• Improve conversion code allow return type inference (#773) (@fingolfin)
• fixed @gapattribute (#774) (@ThomasBreuer)
• Specify types for ‘recursive’ and recursion_dict (#775) (@fingolfin)