Singular.jl 0.21.3 released

Today Singular.jl 0.21.3 has been released.

Diff since v0.21.2

Merged pull requests:

• libsingular_julia: id_prune_map_v (#740) (@hannes14)
• Use julia 1.10 as default in CI (#744) (@lgoettgens)
• libsingular: don’t autobuild for released versions (#747) (@benlorenz)
• update to Singular_jll v403.214.1400 (#748) (@hannes14)
• sleftv conversion: protect some more julia variables from intermediate garbage collections (#749) (@benlorenz)
• new coeff types (#750) (@hannes14)
• add prune_with_map_projection (#751) (@hannes14)
• bump libsingular_julia to 0.40.11 (#752) (@hannes14)