Removed gbm and nnet dependencies due to ALEPlot test code; tests sho…

…uld not run on CRAN

DESCRIPTION

@@ -1,6 +1,6 @@
 Package: ale
 Title: Interpretable Machine Learning and Statistical Inference with Accumulated Local Effects (ALE)
-Version: 0.2.0.20240205
+Version: 0.2.0.20240206
 Authors@R: c(
     person("Chitu", "Okoli", , "[email protected]", role = c("aut", "cre"),
            comment = c(ORCID = "0000-0001-5574-7572")),
@@ -14,11 +14,9 @@ Roxygen: list(markdown = TRUE)
 RoxygenNote: 7.3.1
 Suggests: 
     ALEPlot,
-    gbm,
     gridExtra,
     knitr,
     mgcv,
-    nnet,
     readr,
     rmarkdown,
     testthat (>= 3.0.0)

tests/testthat/test-ALEPlot.R

@@ -8,7 +8,9 @@
 
 # Do not run these on CRAN so that the required packages are not included
 # as dependencies.
-skip_on_cran()
+# https://community.rstudio.com/t/skip-an-entire-test-file-on-cran-only/162842
+if (!identical(Sys.getenv("NOT_CRAN"), "true")) return()
+
 
 ## nnet -----------------