Update ci.yml

Author: ViralBShah

.github/workflows/ci.yml

@@ -8,25 +8,34 @@ on:
 
 jobs:
   build:
-
     runs-on: ${{ matrix.os }}
     strategy:
-      fail-fast: false
       matrix:
         os:
           - ubuntu-latest
           - macos-latest
-          - windows-latest
         arch:
           - x64
           - x32
           - armv7
-          - aarch64
-          
+          - aarch64          
     steps:
     - uses: actions/checkout@v2
-    - uses: msys2/setup-msys2@v2
     - name: make
       run: make
     - name: make test
       run: make test
+  
+  buildwindows:
+    runs-on: windows-latest
+    defaults:
+      run:
+        shell: msys2 {0}
+    steps:
+    - uses: actions/checkout@v2
+    - uses: msys2/setup-msys2@v2
+      with:
+        install: make mingw-w64-x86_64-clang
+    - run: clang --version
+    - run: make USECLANG=1
+    - run: make test