Build tests (#5)

* does automatic fftw detection work now?

* remove explicit windows fftw installation

.github/workflows/R-CMD-check.yaml

@@ -47,11 +47,6 @@ jobs:
           brew install fftw
           brew install libomp
 
-      - name: Install fftw3 on Windows
-        if: runner.os == 'Windows'
-        run: |
-          pacman -Syu mingw-w64-x86_64-fftw --noconfirm
-
       - uses: r-lib/actions/setup-r-dependencies@v2
         with:
           extra-packages: any::rcmdcheck

DESCRIPTION

@@ -33,7 +33,7 @@ Suggests:
 LinkingTo: 
     cpp11
 SystemRequirements:
-    fftw3 (>= 3.3.0),
+    fftw (>= 3.3.0),
     openmp (>= 15.0.0)
 Config/testthat/edition: 3
 URL: https://lschneiderbauer.github.io/fcwtr/