Gets the URL of this package as specified by the DESCRIPTION
file.
# S3 method for class 'Package'
getUrl(this, ...)
Examples
pkg <- Package("R.oo")
print(getUrl(pkg))
#> [1] "https://henrikbengtsson.github.io/R.oo/,\nhttps://github.com/HenrikBengtsson/R.oo"