Attempt to fix GHA errors on ubuntu

Author: jcheng5

.github/workflows/R-CMD-check.yaml

@@ -24,3 +24,4 @@ jobs:
     uses: rstudio/shiny-workflows/.github/workflows/R-CMD-check.yaml@v1
     with:
       minimum-r-version: "3.5.0"
+      ubuntu: "ubuntu-20.04"

tests/testthat/test-normalize-3.R

@@ -44,6 +44,7 @@ test_that("normalize terra", {
 
   ### points ----------------------------------------------------------------
   ptsdata <- vect(breweries91)
+  crs(ptsdata) <- "+proj=longlat +datum=WGS84"
 
   (p1 <- leaflet() %>% addTiles() %>% addCircleMarkers(data = ptsdata))
   (p2 <- leaflet() %>% addTiles() %>% addCircleMarkers(data = breweries91))