Mike Irvine

Results 3 issues of Mike Irvine

- Implemented changes to introduce VoC into fitting and projections. - Updated version number and news to reflect changes - Ran `R CMD check` without errors

In order for the model to remain relevant into 2021 we need to consider how to incorporate the impact of vaccination and VoC. Both of these issues will require changes...

Add option to `plot_projection` to output a sample of trajectories from the posterior as opposed to showing the ribbons representing the percentiles.