macos.yml in relaton-bib-0.4.0

- old
+ new

@@ -10,10 +10,12 @@
     runs-on: macos-latest
     strategy:
       matrix:
         ruby: [ '2.6', '2.5', '2.4' ]
     steps:
-      - uses: actions/checkout@master
+      - uses: actions/checkout@v1
+        with:
+          submodules: recursive
       - name: Use Ruby
         uses: actions/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby }}
           architecture: 'x64'