actions: Checkout submodules

Author: kpcyrd

.github/workflows/default.yml

@@ -19,6 +19,8 @@ jobs:
           - nightly
     steps:
     - uses: actions/checkout@v2
+      with:
+        submodules: true
     - uses: actions-rs/toolchain@v1
       with:
         profile: minimal
@@ -36,6 +38,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
+        with:
+          submodules: true
       - uses: actions-rs/toolchain@v1
         with:
           profile: minimal
@@ -52,6 +56,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
+        with:
+          submodules: true
       - uses: actions-rs/toolchain@v1
         with:
           profile: minimal