simmer 3.6.1

Minor changes and fixes:

• Recycle logical indexes when subsetting (2526e75).
• Implement replacement operators, [<- and [[<- (#88).
• Provide rep() S3 method for trajectories (7fa515e).
• Remove plotting functions (bb9656b), deprecated since v3.6.0. The new simmer.plot package (on CRAN) already covers these features among others.
• Don't evaluate vignette chunks if Suggests are not installed (e40e5b6).
• Rewrite DESCRIPTION (3f26516).
• Add an every parameter to the from_to() convenience function (9d68887).