Bump minimum R version

[MichaelChirico]

Closes #2206

[codecov-commenter]

Codecov Report

Merging #2265 (e1ffd1e) into main (865e2e1) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

❗ Current head e1ffd1e differs from pull request most recent head 2ec3788. Consider uploading reports for the commit 2ec3788 to get more accurate results

@@            Coverage Diff             @@
##             main    #2265      +/-   ##
==========================================
- Coverage   99.63%   99.63%   -0.01%     
==========================================
  Files         115      114       -1     
  Lines        5263     5258       -5     
==========================================
- Hits         5244     5239       -5     
  Misses         19       19              

Files	Coverage Δ
R/settings.R	98.33% <100.00%> (-0.02%)	⬇️
R/shared_constants.R	96.61% <ø> (ø)
R/utils.R	99.13% <ø> (-0.01%)	⬇️
R/xp_utils.R	100.00% <100.00%> (ø)

[IndrajeetPatil]

Great, thanks!