Pin GitHub Actions to full-length commit SHAs

.github/dependabot.yml

@@ -0,0 +1,11 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    groups:
+      github-actions:
+        patterns: ["*"]
+    schedule:
+      interval: "weekly"
+    cooldown:
+      default-days: 7

.github/workflows/package.yml

@@ -7,7 +7,7 @@ jobs:
   linux:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@0717577d45739eb3c851188b29f50ed6c0b2194e # v2.8.0
       - run: |
           set -ex
           mkdir -p samples/linux-libfuzzer
@@ -42,14 +42,14 @@ jobs:
           (cd examples/trivial-crash ; make clean; make CC=$AFL_CC_PATH)
           cp -r examples/trivial-crash/fuzz.exe examples/trivial-crash/seeds samples/linux-trivial-crash-afl
 
-      - uses: actions/upload-artifact@v2.1.4
+      - uses: actions/upload-artifact@58740802ef971a2d71eff71e63d48ab68d1f5507 # v2.1.4
         with:
             name: samples
             path: samples
   windows:
     runs-on: windows-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@0717577d45739eb3c851188b29f50ed6c0b2194e # v2.8.0
       - run: |
           Set-ExecutionPolicy Bypass -Scope Process -Force 
           $ProgressPreference = 'SilentlyContinue'
@@ -87,7 +87,7 @@ jobs:
           cp calendar*/*.pdb,calendar*/*.exe, calendar*/*.dll ../../samples/windows-calendar-app
           cd ../../ 
         shell: powershell
-      - uses: actions/upload-artifact@v2.1.4
+      - uses: actions/upload-artifact@58740802ef971a2d71eff71e63d48ab68d1f5507 # v2.1.4
         with:
             name: samples
             path: samples