Add Dependabot and CodeQL support (#4286)

Signed-off-by: Jauder Ho <jauderho@users.noreply.github.com>

Co-authored-by: Adam Warner <me@adamwarner.co.uk>

.github/workflows/codeql-analysis.yml

@@ -0,0 +1,40 @@
+name: "CodeQL"
+
+on:
+  push:
+    branches:
+      - master
+      - development
+  pull_request:
+    branches:
+      - master
+      - development
+  schedule:
+    - cron: '32 11 * * 6'
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    steps:
+    -
+      name: Checkout repository
+      uses: actions/checkout@v2
+    # Initializes the CodeQL tools for scanning.
+    -
+      name: Initialize CodeQL
+      uses: github/codeql-action/init@v1
+      with:
+        languages: 'python'
+    -
+      name: Autobuild
+      uses: github/codeql-action/autobuild@v1
+    -
+      name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v1