Updated required tools versions.

Author: jgonzalezdr

README.md

@@ -108,8 +108,8 @@ For more information check the [CppUMockGen Usage Manual](MANUAL.md).
 - [cmake](https://cmake.org/) (tested with v3.17.2)
 - [clang](http://releases.llvm.org/download.html) (tested with v10.0.0)
 - A C/C++ compiler, either:
-  - [MinGW-w64](https://sourceforge.net/projects/mingw-w64/) (tested with x86_64-6.4.0-posix-seh-rt_v5-rev0)
-  - [Microsoft Visual Studio](https://www.visualstudio.com/es/downloads/) (tested with Visual Studio Community 2015 and 2017)
+  - [MinGW-w64](https://sourceforge.net/projects/mingw-w64/) (tested with [TDM-GCC 9.2.0](https://jmeubank.github.io/tdm-gcc/download/), will not work with MinGW-w64 releases <= 8.1.0)
+  - [Microsoft Visual Studio](https://www.visualstudio.com/es/downloads/) (tested with Visual Studio Community 2019)
 - [CppUTest](http://cpputest.github.io/) [Optional, not needed if tests are disabled] (tested with v3.7.1 and v3.8)
-- [LCOV](https://github.com/jgonzalezdr/lcov/releases) [Optional, needed if tests and coverage are enabled using GCC/MinGW] (tested with v1.11.1w)
-- [OpenCppCoverage](https://github.com/OpenCppCoverage/OpenCppCoverage) [Optional, needed if tests and coverage are enabled using Visual Studio 2017] (tested with v0.9.6.1)
+- [LCOV for Windows](https://github.com/jgonzalezdr/lcov/releases) [Optional, needed if tests and coverage are enabled using GCC/MinGW] (requires at least v1.14.alpha0w)
+- [OpenCppCoverage](https://github.com/OpenCppCoverage/OpenCppCoverage) [Optional, needed if tests and coverage are enabled using Visual Studio 2019] (tested with v0.9.8.0)