enable GitHub Actions (#3503)

.github/workflows/ufuzz.yml

@@ -0,0 +1,24 @@
+name: Fuzzing
+on:
+  schedule:
+    - cron: "*/15 * * * *"
+jobs:
+  ufuzz:
+    strategy:
+      matrix:
+        os: [ ubuntu-latest, windows-latest ]
+    name: ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v1
+      - shell: bash
+        run: |
+          git clone --branch v1.5.2 --depth 1 https://github.com/jasongin/nvs.git ~/.nvs
+          . ~/.nvs/nvs.sh
+          nvs --version
+          nvs add node/$NODE
+          nvs use node/$NODE
+          node --version
+          npm --version --no-update-notifier
+          npm install --no-audit --no-optional --no-save --no-update-notifier
+          node test/ufuzz/job 3600000