fix catch2 tag

README.md

@@ -9,9 +9,9 @@
 [![license][badge.license]][license]
 [![paypal][badge.paypal]][paypal]
 
-[badge.travis]: https://img.shields.io/travis/BlackMATov/invoke.hpp/master.svg?logo=travis
-[badge.appveyor]: https://img.shields.io/appveyor/ci/BlackMATov/invoke-hpp/master.svg?logo=appveyor
-[badge.codecov]: https://img.shields.io/codecov/c/github/BlackMATov/invoke.hpp/master.svg?logo=codecov
+[badge.travis]: https://img.shields.io/travis/BlackMATov/invoke.hpp/main.svg?logo=travis
+[badge.appveyor]: https://img.shields.io/appveyor/ci/BlackMATov/invoke-hpp/main.svg?logo=appveyor
+[badge.codecov]: https://img.shields.io/codecov/c/github/BlackMATov/invoke.hpp/main.svg?logo=codecov
 [badge.language]: https://img.shields.io/badge/language-C%2B%2B11-red.svg
 [badge.license]: https://img.shields.io/badge/license-MIT-blue.svg
 [badge.paypal]: https://img.shields.io/badge/donate-PayPal-orange.svg?logo=paypal&colorA=00457C
@@ -25,6 +25,12 @@
 
 [invoke]: https://github.com/BlackMATov/invoke.hpp
 
+## Requirements
+
+- [gcc](https://www.gnu.org/software/gcc/) **>= 4.9**
+- [clang](https://clang.llvm.org/) **>= 3.8**
+- [msvc](https://visualstudio.microsoft.com/) **>= 2015**
+
 ## Installation
 
 [invoke.hpp][invoke] is a header-only library. All you need to do is copy the headers files from `headers` directory into your project and include them:

untests/CMakeLists.txt

@@ -40,7 +40,8 @@ add_test(${PROJECT_NAME} ${PROJECT_NAME})
 include(FetchContent)
 FetchContent_Declare(
     catchorg_catch2
-    GIT_REPOSITORY https://github.com/catchorg/catch2)
+    GIT_REPOSITORY https://github.com/catchorg/catch2
+    GIT_TAG v2.13.2)
 
 FetchContent_GetProperties(catchorg_catch2)
 if(NOT catchorg_catch2_POPULATED)