Update README.md

Author: termoshtt

README.md

@@ -2,7 +2,7 @@
 [![Crate](http://meritbadge.herokuapp.com/intel-mkl-src)](https://crates.io/crates/intel-mkl-src)
 [![Build Status](https://dev.azure.com/rust-math/intel-mkl-src/_apis/build/status/rust-math.intel-mkl-src?branchName=master)](https://dev.azure.com/rust-math/intel-mkl-src/_build/latest?definitionId=1&branchName=master)
 
-Redistribution of Intel MKL as a crate. Tested on Linux and macOS.
+Redistribution of Intel MKL as a crate. Tested on Linux, macOS, and Windows (since 0.4.0)
 
 ## Usage
 
@@ -19,6 +19,7 @@ fftw-sys = { version = "0.4", features = ["intel-mkl"] }
 This crate does not download archive if `pkg-config` finds MKL shared library installed by other way.
 Be sure to set `PKG_CONFIG_PATH` and `LD_LIBRARY_PATH` correctly.
 For debian and ubuntu users, [ci/Dockerfile](ci/Dockerfile) may be helpful.
+Windows is not supported yet.
 
 ## License
 MKL is distributed under the Intel Simplified Software License for Intel(R) Math Kernel Library, See [License.txt](License.txt).