[Diff since v0.6.0](https://github.com/LCSB-BioCore/SBML.jl/compare/v0.6.0...v0.7.0) **Closed issues:** - Adding `substoich` and `prodstoich` fields to `Reaction` (#119) - test suite case 00198 fails (#133) - DocStringExtensions usage (particularly on structs) (#136) - SBML doesn't respect math <cn> rationals (#140) **Merged pull requests:** - support for logical operators (#135) (@exaexa) - docstringextensions (#137) (@anandijain) - rational mathval (#141) (@anandijain) - separate reactants and product stoichiometries (#142) (@anandijain) - Make `sbml` slightly more type-stable (#144) (@giordano) - Fix definition of units (#145) (@giordano)