chore: Don't throw error in 'detect_python()'

* No longer throw error in 'detect_python()' so
  R CMD check doesn't fail on CRAN environments missing
  Python system dependency i.e. 'r-devel-windows-x86_64-gcc10-UCRT'.

DESCRIPTION

@@ -1,7 +1,7 @@
 Package: argparse
 Type: Package
 Title: Command Line Optional and Positional Argument Parser
-Version: 2.1.0
+Version: 2.1.1
 Authors@R: c(person("Trevor L", "Davis", role=c("aut", "cre"), email="[email protected]"),
     person("Allen", "Day", role="ctb", comment="Some documentation and examples ported from the getopt package."),
     person("Python Software Foundation", role="ctb", comment="Some documentation from the optparse Python module."),

R/argparse.R

@@ -313,9 +313,8 @@ assert_python_cmd <- function(python_cmd) {
 }
 
 detects_python <- function() {
-    python_cmd <- find_python_cmd()
-    findpython::is_python_sufficient(python_cmd,
-                                     required_modules = c("argparse", "json | simplejson"))
+    python_cmd <- try(find_python_cmd())
+    !inherits(python_cmd, "try-error")
 }
 
 # Internal function to find python cmd

cran-comments.rst

@@ -1,5 +1,9 @@
 ## Notes
 
+* The examples and unit tests are now skipped if an appropriate
+  version of Python is not found as with the 'r-devel-windows-x86_64-gcc10-UCRT'
+  CRAN flavor.
+
 * As in previous uploads while in a non-interactive session (i.e. in an
   Rscript) if ``parse_args()`` observes a help flag it will print a usage
   message and then call ``quit()``.  Additionally if a user specifically adds