Consistency with Modelica Language

[HansOlsson]

If consistency with the Modelica Language is desired the following minor unnecessary changes should be fixed:

• startTime -> StartTime
• stopTime -> StopTime
• tolerance -> Tolerance
• stepSize -> Interval (likely, as it's a bit more complicated - the Interval in Modelica is the output interval (which should be obvious from the result file), whereas solvers may take different step-sizes; for fixed step-size solvers tools can have ways of setting a a different (smaller) step-size).

https://specification.modelica.org/master/annotations.html#annotations-for-simulations

[chrbertsch]

In the FMI project we use (lower) camalCase (https://en.wikipedia.org/wiki/Camel_case), e.g. startTime, see https://fmi-standard.org/docs/3.0.2/#startTime