biocLite is deprecated

[gillsignals]

Throughout the code, you install packages using biocLite. However, the BiocInstaller package is deprecated as of Bioconductor 3.8 and will be removed in Bioconductor 3.9 (see release notes).

You should consider replacing biocLite calls with BiocManager::install instead, especially as the tutorials are directed towards Bioconductor novices who may not yet know how to troubleshoot install/deprecation issues.

Thanks for your courses!