chore(deps): Update dependency stripe to 18.1.0

This is not the newest, (18.3.1 is available iiuc), but I'm matching
the version in the Gemfile.lock in the pay gem since I figure it
will be safer.

See also:
* https://github.com/pay-rails/pay/blob/main/Gemfile.lock#L301
* #472

Author: simonbaird

rails/Gemfile

@@ -87,7 +87,7 @@ gem 'spicy-proton'
 
 # For payments
 gem 'pay', '~> 11.4.0'
-gem 'stripe', '~> 18.0.0'
+gem 'stripe', '~> 18.1.0'
 
 # Needed after ruby 3.1 upgrade
 gem 'net-imap', require: false

rails/Gemfile.lock

@@ -363,7 +363,7 @@ GEM
       activesupport (>= 6.1)
       sprockets (>= 3.0.0)
     stringio (3.2.0)
-    stripe (18.0.1)
+    stripe (18.1.0)
     sysexits (1.2.0)
     temple (0.10.4)
     thor (1.5.0)
@@ -440,7 +440,7 @@ DEPENDENCIES
   selenium-webdriver (~> 4.2)
   simplecov
   spicy-proton
-  stripe (~> 18.0.0)
+  stripe (~> 18.1.0)
   tzinfo-data
   validate_url
   web-console (>= 4.1.0)