Update dependency versions to avoid GitHub warnings

.github/workflows/unit-tests.yaml

@@ -13,10 +13,10 @@ jobs:
   build: # make sure build/ci works properly
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v1
-      - uses: actions/setup-node@v1
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
         with:
-          node-version: '10'
+          node-version: '16'
       - name: Running L0 tests.
         run: |
           npm install

__mocks__/fs.ts

@@ -24,5 +24,8 @@ fs.__setMockFiles = __setMockFiles;
 fs.readFileSync = jest.fn(readFileSync);
 fs.readFile = jest.fn(readFile);
 fs.existsSync = jest.fn(existsSync);
+fs.promises = {
+    access: jest.fn()
+}
 
 module.exports = fs;

action.yaml

@@ -34,5 +34,5 @@ outputs:
     description: 'URL of the check run. Overview about finding of vulnerabilities and best-practices.'
 
 runs:
-  using: 'node12'
+  using: 'node16'
   main: 'lib/main.js'