Polymake.jl 0.4.2 released

Today Polymake.jl 0.4.2 has been released.

Diff since v0.4.1

Closed issues:

• json docs are very short (#269)
• Find out which version of polymake we’re running (#272)
• Cannot construct topaz.vietoris_rips_filtration (#280)
• wipe polymake_user/wrappers at build time (#286)

Merged pull requests:

• json docs: add more information for functions and also full polymake-style text (fix #269) (#275) (@benlorenz)
• Fix/startup error (#276) (@kalmarek)
• disable_sigint() around internal_calls and internal_give (#278) (@kalmarek)
• build.jl: split run argument over multiple lines (#282) (@fingolfin)
• update github checkout action (#284) (@benlorenz)
• function parameters (#285) (@benlorenz)
• fix wrapper cleanup during build (#287) (@benlorenz)
• attachments for BigObject (#288) (@benlorenz)
• bump to 0.4.2 (#289) (@kalmarek)