👷 Add CARGO_TERM_COLOR environment variable and update matrix for car…

…go_test job

.github/workflows/integration-test.yml

@@ -10,6 +10,7 @@ on:
 
 env:
     MOLD_VERSION: 2.4.0
+    CARGO_TERM_COLOR: always
 
 jobs:
 
@@ -46,8 +47,12 @@ jobs:
           run: cargo clippy
 
     cargo_test:
+        strategy:
+          fail-fast: false
+          matrix:
+            os: [ubuntu-latest, windows-latest, macos-latest]
         name: Cargo Test
-        runs-on: ubuntu-latest
+        runs-on: ${{ matrix.os }}
         steps:
         - uses: actions/checkout@v4
         - uses: actions/cache@v4