fix CI configuration

Author: johnnychen94

.github/workflows/UnitTest.yml

@@ -26,9 +26,11 @@ jobs:
           - x64
         include:
           - os: windows-latest
-            julia-version: '1'
+            version: '1'
+            arch: x64
           - os: macOS-latest
-            julia-version: '1'
+            version: '1'
+            arch: x64
     steps:
       - uses: actions/checkout@v2
       - uses: julia-actions/setup-julia@v1