Update README

README.md

@@ -26,10 +26,10 @@ Feature flags
 - `system`: use system's libfftw3 (experimental)
     - You must install FFTW to your system before building this crate
     - For Linux system, e.g. Ubuntu or Debian, please run `apt install libfftw3-dev`
-    - For macOS, please run `brew install fftw` by using [homebrew](https://github.com/Homebrew/brew) 
-    - For Windows, this feature is not tested.
+    - For macOS, please run `brew install fftw` by using [homebrew](https://github.com/Homebrew/brew)
+    - For Windows, this feature is supported
 - `intel-mkl` use Intel MKL backend through [intel-mkl-src](https://github.com/termoshtt/rust-intel-mkl)
-    - Linux, macOS, and Windows are supported
+    - Linux and Windows are supported
 
 |Feature  | Linux | Windows | macOS |
 |:--------|:-----:|:-------:|:-----:|