Merge pull request #11 from epiverse-trace/dev

adding etdev package to description file

.lintr

@@ -5,10 +5,9 @@ linters: linters_with_tags(
     implicit_integer_linter = NULL,
     extraction_operator_linter = NULL,
     todo_comment_linter = NULL,
-    function_argument_linter = NULL,
+    function_argument_linter = NULL
     # Use minimum R declared in DESCRIPTION or fall back to current R version.
     # Install etdev package from https://github.com/epiverse-trace/etdev
-    backport_linter(if (length(x <- etdev::extract_min_r_version())) x else getRversion())
   )
 exclusions: list(
     "tests/testthat.R" = list(unused_import_linter = Inf)