[R] Automating package updates after major version change

[Rich Shepard]

After upgrading from -3.6.2 to -4.0.0 I ran 'update.packages()' and spent
time rebuilding dependencies, too. Is there a script or method that
automates package updates after a major version change in R?

My web searches on this topic found tips for only regular package updates
without rebuilding multiple dependencies.

TIA,

Rich