Upgrade rspec-rails gem to ~> 4.0

Gemfile

@@ -92,7 +92,7 @@ group :development, :test do
   # Call 'byebug' anywhere in the code to stop execution and get a debugger console
   gem 'byebug', platforms: %i[mri mingw x64_mingw]
   gem 'factory_bot_rails', '~> 5.0'
-  gem 'rspec-rails', '~> 3.8'
+  gem 'rspec-rails', '~> 4.0'
   gem 'rubocop-performance', '~> 1.2'
   gem 'rubocop-rspec', '~> 1.32'
 end

Gemfile.lock

@@ -196,23 +196,23 @@ GEM
     rb-inotify (0.10.0)
       ffi (~> 1.0)
     regexp_parser (1.6.0)
-    rspec-core (3.9.0)
-      rspec-support (~> 3.9.0)
-    rspec-expectations (3.9.0)
+    rspec-core (3.9.2)
+      rspec-support (~> 3.9.3)
+    rspec-expectations (3.9.2)
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.9.0)
-    rspec-mocks (3.9.0)
+    rspec-mocks (3.9.1)
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.9.0)
-    rspec-rails (3.9.0)
-      actionpack (>= 3.0)
-      activesupport (>= 3.0)
-      railties (>= 3.0)
-      rspec-core (~> 3.9.0)
-      rspec-expectations (~> 3.9.0)
-      rspec-mocks (~> 3.9.0)
-      rspec-support (~> 3.9.0)
-    rspec-support (3.9.0)
+    rspec-rails (4.0.0)
+      actionpack (>= 4.2)
+      activesupport (>= 4.2)
+      railties (>= 4.2)
+      rspec-core (~> 3.9)
+      rspec-expectations (~> 3.9)
+      rspec-mocks (~> 3.9)
+      rspec-support (~> 3.9)
+    rspec-support (3.9.3)
     rubocop (0.78.0)
       jaro_winkler (~> 1.5.1)
       parallel (~> 1.10)
@@ -323,7 +323,7 @@ DEPENDENCIES
   nio4r (= 2.5.1)
   puma (= 4.3.3)
   rails (~> 5.2.3)
-  rspec-rails (~> 3.8)
+  rspec-rails (~> 4.0)
   rubocop-performance (~> 1.2)
   rubocop-rspec (~> 1.32)
   rufus-scheduler (~> 3.6)
@@ -339,4 +339,4 @@ DEPENDENCIES
   yard (~> 0.9.20)
 
 BUNDLED WITH
-   2.1.2
+   2.1.4