fixup! Support docker qemu emulation in any linux env

.github/workflows/test.yml

@@ -24,7 +24,8 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-18.04, windows-latest, macos-latest]
+        os: [ubuntu-18.04]
+        # os: [ubuntu-18.04, windows-latest, macos-latest]
         python_version: ['3.7']
     timeout-minutes: 180
     steps:
@@ -52,7 +53,7 @@ jobs:
       uses: docker/setup-qemu-action@v1
       with:
         platforms: all
-      if: runner.os == "Linux"
+      if: runner.os == 'Linux'
 
     - name: Sample build
       if: contains(steps.pr-labels.outputs.labels, ' ci-sample-build ')