Merge branch 'master' into add-tests-to-c-api-2

.github/workflows/ccpp.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2
     - name: configure
       run: cmake CMakeLists.txt
     - name: build
@@ -23,7 +23,7 @@ jobs:
     runs-on: macos-latest
     
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2
     - name: configure
       run: cmake CMakeLists.txt
     - name: build
@@ -35,7 +35,7 @@ jobs:
     runs-on: windows-latest
     
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2
     - name: configure
       run: cmake CMakeLists.txt
     - name: build