v4.2.0

v4.2.0 (2019-07-01)

Diff since v4.1.0

Closed issues:

• Register (#40)
• DDETST Equations (#11)

Merged pull requests:

• Add DDETST problems and restructure existing DDE problems (#39) (devmotion)
• Add Project.toml and update Appveyor script (#38) (devmotion)
• Create ODE_Nonlinear_system_of_reactions_with_an_analytical_solution (#37) (EdelmanJonathan)
• Add CITATION.bib (#36) (asinghvi17)