Merge pull request #1134 from alphagov/dependabot/bundler/gds-sso-18.1.0

Bump gds-sso from 18.0.0 to 18.1.0

Author: Al Davidson

Gemfile.lock

@@ -126,7 +126,7 @@ GEM
       null_logger
       plek (>= 1.9.0)
       rest-client (~> 2.0)
-    gds-sso (18.0.0)
+    gds-sso (18.1.0)
       oauth2 (~> 2.0)
       omniauth (~> 2.1)
       omniauth-oauth2 (~> 1.8)
@@ -474,8 +474,8 @@ GEM
     rack (2.2.8)
     rack-cache (1.14.0)
       rack (>= 0.4)
-    rack-protection (3.0.6)
-      rack
+    rack-protection (3.1.0)
+      rack (~> 2.2, >= 2.2.4)
     rack-proxy (0.7.6)
       rack
     rack-test (2.1.0)