Bump gds-sso from 18.1.0 to 19.0.0

Bumps [gds-sso](https://github.com/alphagov/gds-sso) from 18.1.0 to 19.0.0.
- [Changelog](https://github.com/alphagov/gds-sso/blob/main/CHANGELOG.md)
- [Commits](alphagov/gds-sso@v18.1.0...v19.0.0)

---
updated-dependencies:
- dependency-name: gds-sso
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Gemfile.lock

@@ -141,7 +141,7 @@ GEM
       null_logger
       plek (>= 1.9.0)
       rest-client (~> 2.0)
-    gds-sso (18.1.0)
+    gds-sso (19.0.0)
       oauth2 (~> 2.0)
       omniauth (~> 2.1)
       omniauth-oauth2 (~> 1.8)
@@ -219,7 +219,7 @@ GEM
     mutex_m (0.2.0)
     net-http (0.4.1)
       uri
-    net-imap (0.4.9.1)
+    net-imap (0.4.10)
       date
       net-protocol
     net-pop (0.1.2)
@@ -230,14 +230,14 @@ GEM
       net-protocol
     netrc (0.11.0)
     nio4r (2.7.0)
-    nokogiri (1.16.0)
+    nokogiri (1.16.2)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
-    nokogiri (1.16.0-aarch64-linux)
+    nokogiri (1.16.2-aarch64-linux)
       racc (~> 1.4)
-    nokogiri (1.16.0-arm64-darwin)
+    nokogiri (1.16.2-arm64-darwin)
       racc (~> 1.4)
-    nokogiri (1.16.0-x86_64-linux)
+    nokogiri (1.16.2-x86_64-linux)
       racc (~> 1.4)
     null_logger (0.0.1)
     oauth2 (2.0.9)
@@ -247,7 +247,7 @@ GEM
       rack (>= 1.2, < 4)
       snaky_hash (~> 2.0)
       version_gem (~> 1.1)
-    omniauth (2.1.1)
+    omniauth (2.1.2)
       hashie (>= 3.4.6)
       rack (>= 2.2.3)
       rack-protection
@@ -496,7 +496,8 @@ GEM
     raabro (1.4.0)
     racc (1.7.3)
     rack (2.2.8)
-    rack-protection (3.1.0)
+    rack-protection (3.2.0)
+      base64 (>= 0.1.0)
       rack (~> 2.2, >= 2.2.4)
     rack-proxy (0.7.7)
       rack