New version: UnfoldSim v0.2.0

[JuliaRegistrator]

• Registering package: UnfoldSim
• Repository: https://github.com/unfoldtoolbox/UnfoldSim.jl
• Created by: @behinger
• Version: v0.2.0
• Commit: f114405f1c9ae002f21f829f5339f9c2cd35fb19
• Reviewed by: @behinger
• Reference: JuliaRegistrator Issue unfoldtoolbox/UnfoldSim.jl#15 (comment)
• Description: Simulate EEG / ERP data with overlap, non-linear effects, multiple regression
• Release notes:

- Breaking: simulate for `MultiSubjectDesign` now returns a 2Dinstead of the concatenated 1D matrix (or 3D instead of 2D in case of multichannel / `return_epoched`).  @jschepers together with @behinger. Note the following clarifications how noise is added to the signal:
  - If `return_epoched = true` and `onset =NoOnset()` the noise is added to the epoched data matrix
  - If `onset` is not `NoOnset`, a continuous eeg signal is created and the noise is added to this i.e. this means that the noise won't be the same as in the `onset = NoOnset()` case even if `return_epoched = true`.
  - The case `return_epoched = false` and `onset = NoOnset()` is not possible and therefore covered by an assert statement
- New Tutorial: Using already existing onsets @behinger
- New Reference: Onset distributions @jschepers 
- Empty `SingleSubjectDesign` now returns a design with a `Dummy` trial/condition, instead of throwing an error @behinger 
- much improved unittests @jschepers

[github-actions]

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