chore(code): add GitHub CodeQL quality tool

.github/renovate.json

@@ -8,8 +8,5 @@
   "lockFileMaintenance": { "enabled": true },
   "schedule": [
     "before 3am on Monday"
-  ],
-  "npm": {
-    "stabilityDays": 3
-  }
+  ]
 }

.github/workflows/codeql.yml

@@ -0,0 +1,39 @@
+name: "CodeQL"
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [ "main" ]
+  schedule:
+    - cron: '0 3 * * 1'
+
+jobs:
+  analyze:
+    name: Analyze OIBus code
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'javascript' ]
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      # Initializes the CodeQL tools for scanning.
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v2
+        with:
+          languages: ${{ matrix.language }}
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v2
+        with:
+          category: "/language:${{matrix.language}}"

src/south/south-rest/south-rest.js

@@ -217,7 +217,7 @@ class SouthRest extends SouthConnector {
       headers['Content-Length'] = bodyToSend.length
       const requestOptions = {
         method: this.requestMethod,
-        agent: this.acceptSelfSigned ? new https.Agent({ rejectUnauthorized: false }) : null, // lgtm [js/disabling-certificate-validation]
+        agent: this.acceptSelfSigned ? new https.Agent({ rejectUnauthorized: false }) : null,
         timeout: this.connectionTimeout,
         host: this.host,
         port: this.port,
@@ -235,7 +235,7 @@ class SouthRest extends SouthConnector {
     const fetchOptions = {
       method: this.requestMethod,
       headers,
-      agent: this.acceptSelfSigned ? new https.Agent({ rejectUnauthorized: false }) : null, // lgtm [js/disabling-certificate-validation]
+      agent: this.acceptSelfSigned ? new https.Agent({ rejectUnauthorized: false }) : null,
       timeout: this.connectionTimeout,
     }
     const requestUrl = `${this.protocol}://${this.host}:${this.port}${this.endpoint}${