ci: replace macos-latest with macos-12 for go1.13 (#326)

.github/workflows/test.yml

@@ -55,8 +55,22 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        go: [1.13, 1.21]
+        go: [1.13, 1.22]
         os: [ubuntu-latest, macos-latest, windows-latest]
+        include:
+          # TODO(panjf2000): There is an uncanny issue arising when downloading
+          # go modules on macOS 13 for Go1.13. So we use macOS 12 for now,
+          # but try to figure it out and use macOS once it's resolved.
+          # https://github.com/panjf2000/ants/actions/runs/9546726268/job/26310385582
+          - go: 1.13
+            os: macos-12
+        exclude:
+          # Starting macOS 14 GitHub Actions runners are arm-based,
+          # but Go didn't support arm64 until 1.16. Thus, we must
+          # replace the macOS 14 runner with macOS 12 runner for Go 1.13.
+          # Ref: https://github.com/actions/runner-images/issues/9741
+          - go: 1.13
+            os: macos-latest
     name: Go ${{ matrix.go }} @ ${{ matrix.os }}
     runs-on: ${{ matrix.os}}
     steps: