[Diff since v1.5.0](https://github.com/LCSB-BioCore/SBML.jl/compare/v1.5.0...v1.5.1) **Merged pull requests:** - bump documenter version, use doc pkg cache (#256) (@exaexa) - Add support for specie conversionFactor (#259) (@sebapersson) **Closed issues:** - Add support for species conversion factor (#257) - Support StoichiometryMath (#258)