Submitted a fix to 3.1.0 that skips some learning-to-rank tests on 32-bit Windows.
## v3.1.0 - Submission 1 - (November 15, 2020)
### CRAN response
Accepted to CRAN, November 18.
On November 21, found out that the CRAN's `r-oldrel-windows-ix86+x86_64` check was failing, with an issue similar to the one faced on Solaris and fixed in https://github.com/microsoft/LightGBM/pull/3534.
CRAN did not ask for a re-submission, but this was fixed in 3.1.1.
### Maintainer Notes
This package was submitted with the following information in the "optional comments" box.