[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)
This tag has no release notes.