test: update actions/checkout v2. change step timing.

  (actions/setup-node#77)

.github/workflows/check_push_cmake_build.yml

@@ -24,14 +24,18 @@ jobs:
         exclude:
           - os: macos-latest
             node: 8
-          - os: macos-latest
+          - os: ubuntu-latest
+            node: 12
+          - os: ubuntu-latest
             node: 13
 
     steps:
+    - uses: actions/checkout@v2
+    - name: Clear tool cache
+      run: rm -rf $RUNNER_TOOL_CACHE/*
     - uses: actions/setup-node@v1
       with:
         node-version: ${{ matrix.node }}
-    - uses: actions/checkout@v1
     - name: cmake-useCache-ubuntu
       if: matrix.os == 'ubuntu-latest'
       uses: actions/cache@v1
@@ -66,6 +70,7 @@ jobs:
 
   cmake-build:
     name: cmake build
+    needs: cmake-js-build
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
@@ -91,7 +96,7 @@ jobs:
             target: java
 
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2
     - name: setup python
       if: matrix.target == 'python'
       uses: actions/setup-python@v1