[Diff since v0.7.0](https://github.com/LCSB-BioCore/SBML.jl/compare/v0.7.0...v0.8.0) **Closed issues:** - Tag? (#149) **Merged pull requests:** - simplify stoichiometry_matrix API & make it more efficient (#147) (@exaexa) - Update to Symbolics 3 (#148) (@ChrisRackauckas) - release 0.8 (#150) (@exaexa)