v13.4.0

Catalyst v13.4.0

Diff since v13.3.0

Closed issues:

• @parameters and @variables are malfunctioning (#646)
• Linear Interpolation as an algebraic function in a reaction network (#647)
• Species' order is not defined by @species (#649)

Merged pull requests:

• Tutorial for (mostly Symbol based) interfacing with problems, integrators, and solutions (#639) (@TorkelE)
• CompatHelper: add new compat entry for OrdinaryDiffEq at version 6 for package docs, (keep existing compat) (#642) (@github-actions[bot])
• CompatHelper: add new compat entry for StochasticDiffEq at version 6 for package docs, (keep existing compat) (#643) (@github-actions[bot])
• finish Hodgkin-Huxley tutorial (#645) (@isaacsas)
• Adds @Compound macro (#651) (@LalitChauhan56)
• adding discrete event to event doc (#652) (@tstrey)
• disable formatter on test files (#654) (@isaacsas)
• Fix namespacing (#666) (@YingboMa)
• Finish balancing PR (#667) (@isaacsas)
• update HISTORY for compounds (#668) (@isaacsas)