Polymake.jl 0.11.9 released

Today Polymake.jl 0.11.9 has been released.

Diff since v0.11.8

Merged pull requests:

• try aqua 0.8 (#461) (@benlorenz)
• set random callback to julia rng (#462) (@benlorenz)
• tests: reduce types for arithmetic tests for pkgeval (#463) (@benlorenz)
• allow documenter 1.x (#464) (@benlorenz)