Update rspec requirement from ~> 3.11.0 to ~> 3.12.0

Updates the requirements on [rspec](https://github.com/rspec/rspec-metagem) to permit the latest version.
- [Release notes](https://github.com/rspec/rspec-metagem/releases)
- [Commits](rspec/rspec-metagem@v3.11.0...v3.12.0)

---
updated-dependencies:
- dependency-name: rspec
  dependency-type: direct:development
...

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

Gemfile

@@ -12,7 +12,7 @@ group :test do
   gem 'simplecov-lcov', '~> 0.8.0'
   gem 'pry'
   gem 'rb-readline'
-  gem 'rspec', '~> 3.11.0'
+  gem 'rspec', '~> 3.12.0'
   gem 'rubocop', '~> 1.49'
   gem 'webmock', '~> 3.13'
 end

Gemfile.lock

@@ -58,19 +58,19 @@ GEM
     rb-readline (0.5.5)
     regexp_parser (2.7.0)
     rexml (3.2.5)
-    rspec (3.11.0)
-      rspec-core (~> 3.11.0)
-      rspec-expectations (~> 3.11.0)
-      rspec-mocks (~> 3.11.0)
-    rspec-core (3.11.0)
-      rspec-support (~> 3.11.0)
-    rspec-expectations (3.11.1)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-core (3.12.1)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.2)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.11.0)
-    rspec-mocks (3.11.2)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.5)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.11.0)
-    rspec-support (3.11.1)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.0)
     rubocop (1.49.0)
       json (~> 2.3)
       parallel (~> 1.10)
@@ -106,7 +106,7 @@ DEPENDENCIES
   pry
   rake
   rb-readline
-  rspec (~> 3.11.0)
+  rspec (~> 3.12.0)
   rubocop (~> 1.49)
   simplecov (~> 0.22.0)
   simplecov-html (~> 0.12.3)