Pin versions of actions in workflow (#980)

.github/workflows/build.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v2
+        uses: actions/checkout@5a4ac9002d0be2fb38bd78e4b4dbde5606d7042f
 
       - name: Set up cloc
         run: |
@@ -28,9 +28,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Set up Node
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@46071b5c7a2e0c34e49c3cb8a0e792e86e18d5ea
         with:
-          node-version: '14.x'
+          node-version: '14'
 
       - name: Print environment
         run: |
@@ -80,7 +80,7 @@ jobs:
           DCT_DELEGATE_KEY: ${{ steps.retrieve-secrets.outputs.dct-delegate-2-key }}
 
       - name: Checkout repo
-        uses: actions/checkout@v2
+        uses: actions/checkout@5a4ac9002d0be2fb38bd78e4b4dbde5606d7042f
 
       - name: Restore
         run: dotnet tool restore
@@ -165,34 +165,33 @@ jobs:
     runs-on: windows-latest
     steps:
       - name: Set up NuGet
-        uses: nuget/setup-nuget@v1
+        uses: nuget/setup-nuget@04b0c2b8d1b97922f67eca497d7cf0bf17b8ffe1
         with:
           nuget-version: 'latest'
 
       - name: Set up MSBuild
-        uses: microsoft/setup-msbuild@v1
+        uses: microsoft/setup-msbuild@c26a08ba26249b81327e26f6ef381897b6a8754d
 
       - name: Set up Node
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@46071b5c7a2e0c34e49c3cb8a0e792e86e18d5ea
         with:
-          node-version: '14.x'
+          node-version: '14'
 
       - name: Print environment
         run: |
-          nuget help
+          nuget help | grep Version
           msbuild -version
           dotnet --info
           node --version
           npm --version
-          Write-Output "GitHub ref: $env:GITHUB_REF"
-          Write-Output "GitHub event: $env:GITHUB_EVENT"
-        shell: pwsh
+          echo "GitHub ref: $GITHUB_REF"
+          echo "GitHub event: $GITHUB_EVENT"
         env:
           GITHUB_REF: ${{ github.ref }}
           GITHUB_EVENT: ${{ github.event_name }}
 
       - name: Checkout repo
-        uses: actions/checkout@v2
+        uses: actions/checkout@5a4ac9002d0be2fb38bd78e4b4dbde5606d7042f
 
       - name: npm install
         run: npm install