Merge pull request #6114 from alphagov/dependabot/bundler/webmock-3.18.1

Bump webmock from 3.14.0 to 3.18.1

Author: KludgeKML

Gemfile.lock

@@ -66,8 +66,8 @@ GEM
       i18n (>= 1.6, < 2)
       minitest (>= 5.1)
       tzinfo (~> 2.0)
-    addressable (2.8.0)
-      public_suffix (>= 2.0.2, < 5.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     ast (2.4.2)
     better_errors (2.9.1)
       coderay (>= 1.0.0)
@@ -246,7 +246,7 @@ GEM
     pry (0.14.1)
       coderay (~> 1.1)
       method_source (~> 1.0)
-    public_suffix (4.0.7)
+    public_suffix (5.0.0)
     puma (5.6.5)
       nio4r (~> 2.0)
     racc (1.6.0)
@@ -399,7 +399,7 @@ GEM
     unicorn (6.1.0)
       kgio (~> 2.6)
       raindrops (~> 0.7)
-    webmock (3.14.0)
+    webmock (3.18.1)
       addressable (>= 2.8.0)
       crack (>= 0.3.2)
       hashdiff (>= 0.4.0, < 2.0.0)