Update utils.rs

Create codeql.yml

Create stackhawk.yml

Create SECURITY.md

updates for cargo

Update topological_index.rs

Update topological_index.rs

linter updates

changes for passing linter.

Update codeql.yml

delete codeql

remove file

Update topological_index.rs

Revert "Update utils.rs"

This reverts commit ce4d2a7.

security file

.gitignore

@@ -11,3 +11,4 @@ analyzer-target
 *.code-workspace
 /setup
 testing/integration/perflogs*
+/.history/

security.md

@@ -0,0 +1,21 @@
+# Security Policy
+
+## Supported Versions
+
+Use this section to tell people about which versions of your project are
+currently being supported with security updates.
+
+| Version | Supported          |
+| ------- | ------------------ |
+| 5.1.x   | :white_check_mark: |
+| 5.0.x   | :x:                |
+| 4.0.x   | :white_check_mark: |
+| < 4.0   | :x:                |
+
+## Reporting a Vulnerability
+
+Use this section to tell people how to report a vulnerability.
+
+Tell them where to go, how often they can expect to get an update on a
+reported vulnerability, what to expect if the vulnerability is accepted or
+declined, etc.