Singular.jl 0.5.5 released

Today Singular.jl 0.5.5 has been released.

Diff since v0.5.4

Merged pull requests:

• Make two faux inner constructors outer ones (#440) (@fingolfin)
• support smatrix in caller.jl (#443) (@tthsqe12)
• print QQ elems in reduced form (#444) (@tthsqe12)
• move smatrix outta the isa switch and gc protect (#445) (@tthsqe12)
• Bump version (#446) (@thofma)