Use rustversion instead of version_check in strum_tests

strum_tests/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "strum_tests"
-version = "0.22.0"
+version = "0.23.0"
 edition = "2018"
 authors = ["Peter Glotfelty <peglotfe@microsoft.com>"]
 
@@ -12,8 +12,5 @@ enum_variant_type = "=0.2.0"
 structopt = "0.2.18"
 bitflags = "=1.2"
 
-[build-dependencies]
-version_check = "0.9.2"
-
 [dev-dependencies]
 rustversion = "1.0"

strum_tests/build.rs

@@ -1,7 +0,0 @@
-fn main() {
-    // Check if version of rustc is >= 1.34
-    if let Some(true) = version_check::is_min_version("1.34.0") {
-        println!("cargo:rustc-cfg=try_from");
-        println!("cargo:rustc-cfg=bare_pub");
-    }
-}

strum_tests/tests/enum_discriminants.rs

@@ -204,8 +204,8 @@ fn from_ref_test_complex() {
     assert_eq!(EnumIntoComplexVars::A, (&EnumIntoComplex::A(&rara)).into());
 }
 
-#[cfg(try_from)]
 #[allow(dead_code)]
+#[rustversion::since(1.34)]
 #[derive(Debug, Eq, PartialEq, EnumDiscriminants, EnumVariantType)]
 #[strum_discriminants(
     name(VariantFilterAttrDiscs),
@@ -219,8 +219,8 @@ enum VariantFilterAttr {
     BrightWhite(i32),
 }
 
-#[cfg(try_from)]
+#[rustversion::attr(since(1.34), test)]
-#[test]
+#[rustversion::since(1.34)]
 fn filter_variant_attributes_pass_through() {
     use std::str::FromStr;
 
@@ -238,8 +238,8 @@ fn filter_variant_attributes_pass_through() {
     );
 }
 
-#[cfg(bare_pub)]
 #[test]
+#[rustversion::since(1.34)]
 fn override_visibility() {
     mod private {
         use super::*;
@@ -259,8 +259,8 @@ fn override_visibility() {
     );
 }
 
-#[cfg(not(bare_pub))]
 #[test]
+#[rustversion::before(1.34)]
 fn override_visibility() {
     mod private {
         use super::*;