Add alexedwards/scs (#2580)

README.md

@@ -151,6 +151,7 @@ Please take a quick gander at the [contribution guidelines](https://github.com/a
 * [paseto](https://github.com/o1egl/paseto) - Golang implementation of Platform-Agnostic Security Tokens (PASETO).
 * [permissions2](https://github.com/xyproto/permissions2) - Library for keeping track of users, login states and permissions. Uses secure cookies and bcrypt.
 * [rbac](https://github.com/zpatrick/rbac) - Minimalistic RBAC package for Go applications.
+* [scs](https://github.com/alexedwards/scs) - Session Manager for HTTP servers.
 * [securecookie](https://github.com/chmike/securecookie) - Efficient secure cookie encoding/decoding.
 * [session](https://github.com/icza/session) - Go session management for web servers (including support for Google App Engine - GAE).
 * [sessiongate-go](https://github.com/f0rmiga/sessiongate-go) - Go session management using the SessionGate Redis module.