Campsis v1.4.0

This release includes several tickets related to speed improvements:

• Run replicates in parallel #107
• Run scenarios in parallel #111
• Parallelise export of dataset #109
• Rework simulation settings #110
• Mrgsolve: don't recompile model for each replicate #93
• Write new vignette about parallelisation #113

It also includes the rework of the progress bar using package progressr:

• Replace progress package by progressr package #108
• Write new vignette about progress bar #113

It finally includes a few minor tickets:

• Remove RxODE from the suggested packages since it is not on CRAN anymore #106
• Remove messages output by rxode2 in console #114