Update VCR to 4.0.0

Gemfile

@@ -8,6 +8,6 @@ group :development, :test do
   gem 'rspec-its', '~> 1.0.0'
   gem 'rubocop', '0.49.1', require: false
   gem 'simplecov', '~> 0.9.0', require: false
-  gem 'vcr', '~> 2.4.0'
+  gem 'vcr', '~> 4.0.0'
   gem 'webmock', '~> 1.9.0'
 end

Gemfile.lock

@@ -59,7 +59,7 @@ GEM
     simplecov-html (0.9.0)
     thor (0.20.0)
     unicode-display_width (1.4.0)
-    vcr (2.4.0)
+    vcr (4.0.0)
     webmock (1.9.3)
       addressable (>= 2.2.7)
       crack (>= 0.3.2)
@@ -75,7 +75,7 @@ DEPENDENCIES
   rspec-its (~> 1.0.0)
   rubocop (= 0.49.1)
   simplecov (~> 0.9.0)
-  vcr (~> 2.4.0)
+  vcr (~> 4.0.0)
   webmock (~> 1.9.0)
 
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