Found the following (possibly) invalid URLs:
URL: https://binder.pangeo.io/v2/gh/giswqs/whitebox-r-binder/master?urlpath=rstudio
From: README.md
Status: Error
Message: Failed to connect to binder.pangeo.io port 443: Timed out
URL: https://codecov.io/gh/giswqs/whiteboxR (moved to https://app.codecov.io/gh/giswqs/whiteboxR)
From: README.md
Status: 200
Message: OK
[x] Update demo.Rmd
[x] R Hub Check --as-cran
[x] Local R CMD Check
[x] devtools::spell_check() / update WORDLIST
[x] News (no 2.1.0 release on jblindsay/whitebox-tools)
devtools::spell_check()
/ update WORDLIST