test: skip http tests failing on old rubies

Author: bf4

features/open_api.feature

@@ -289,6 +289,7 @@ Feature: Generate Open API Specification from test examples
     And   the output should contain "7 examples, 0 failures"
     And   the exit status should be 0
 
+  @ruby27_required
   Scenario: Index file should look like we expect
     Then the file "doc/api/open_api.json" should contain JSON exactly like:
     """

features/support/env.rb

@@ -9,3 +9,9 @@
   config.match = :prefer_exact
   config.ignore_hidden_elements = false
 end
+
+Before('@ruby27_required') do |scenario|
+  if RUBY_VERSION < '2.7'
+    skip("Skipped on Ruby #{RUBY_VERSION} (requires >= 2.7)")
+  end
+end

spec/http_test_client_spec.rb

@@ -7,6 +7,9 @@
 
 describe RspecApiDocumentation::HttpTestClient do
   before(:all) do
+    if RUBY_VERSION < '2.7'
+      skip("Skipped on Ruby #{RUBY_VERSION} (requires >= 2.7)")
+    end
     WebMock.allow_net_connect!
     # Capybara.server= was introduced in later versions
     # For older versions, we use the Capybara::Server directly with webrick