[skip-ci] Setup codeql-analysis.yml (#182)

Author: dustinchilson

.github/workflows/ci.yaml

@@ -1,4 +1,4 @@
-name: CI-Build
+name: ci
 
 on:
   push:

.github/workflows/codeql-analysis.yml

@@ -0,0 +1,32 @@
+name: "codeql-analysis"
+on:
+  pull_request:
+  schedule:
+    - cron: '0 14 * * 4'
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v2
+      with:
+        fetch-depth: 2
+
+    - run: git checkout HEAD^2
+      if: ${{ github.event_name == 'pull_request' }}      
+
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v1
+      with:
+        languages: csharp
+
+    - uses: actions/setup-dotnet@v1
+      with:
+        dotnet-version: '5.0.100'
+
+    - name: Autobuild
+      uses: github/codeql-action/autobuild@v1
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v1