Add 'Introduced in Catch 2.4.1.' text

docs/configuration.md

@@ -130,6 +130,8 @@ Catch's selection, by defining either `CATCH_CONFIG_CPP11_TO_STRING` or
     CATCH_CONFIG_CPP17_STRING_VIEW          // Provide StringMaker specialization for std::string_view
     CATCH_CONFIG_CPP17_VARIANT              // Override C++17 detection for CATCH_CONFIG_ENABLE_VARIANT_STRINGMAKER
 
+`CATCH_CONFIG_CPP17_STRING_VIEW` was [introduced](https://github.com/catchorg/Catch2/issues/1376) in Catch 2.4.1.
+
 Catch contains basic compiler/standard detection and attempts to use
 some C++17 features whenever appropriate. This automatic detection
 can be manually overridden in both directions, that is, a feature
@@ -209,6 +211,8 @@ By default, Catch does not stringify some types from the standard library. This
     CATCH_CONFIG_ENABLE_OPTIONAL_STRINGMAKER // Provide StringMaker specialization for std::optional (on C++17)
     CATCH_CONFIG_ENABLE_ALL_STRINGMAKERS     // Defines all of the above
 
+`CATCH_CONFIG_ENABLE_VARIANT_STRINGMAKER` was [introduced](https://github.com/catchorg/Catch2/issues/1380) in Catch 2.4.1.
+
 `CATCH_CONFIG_ENABLE_OPTIONAL_STRINGMAKER` was [introduced](https://github.com/catchorg/Catch2/issues/1510) in Catch 2.6.0.
 
 ## Disabling exceptions