chore(ci): fix FOSSA and snyk integrations

FOSSA failure is due to `Microsoft.NET.Test.Sdk` in the tests which has already been cleared by legal

.fossa.yml

@@ -7,3 +7,9 @@ project:
   name: github.com/auth0-lab/fga-dotnet-sdk
   link: fga.dev
   url: github.com/auth0-lab/fga-dotnet-sdk
+
+paths:
+  only:
+    - ./src/Auth0.Fga
+  exclude:
+    - ./src/Auth0.Fga.Test

.github/workflows/main.yaml

@@ -31,6 +31,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
+      - name: Setup .NET
+        uses: actions/setup-dotnet@v1
+        with:
+          dotnet-version: 6.0.x
+      - name: Restore dependencies
+        run: dotnet restore
       - name: Run Snyk to check for vulnerabilities
         uses: snyk/actions/dotnet@master
         env: