Singular.jl 0.9.1 released

Today Singular.jl 0.9.1 has been released.

Diff since v0.9.0

Merged pull requests:

• CI: ensure updating a PR cancels running CI jobs for it (#528) (@fingolfin)
• Bump dependencies (#531) (@thofma)
• Tag 0.9.1 (#533) (@thofma)