Fix start_with deprecation

Author: leequarella

spec/dummy/config/environments/test.rb

@@ -13,7 +13,7 @@
   config.eager_load = false
 
   # Configure static file server for tests with Cache-Control for performance.
-  if Rails.version.start_with?("5")
+  if Rails.version.start_with?("4")
     config.public_file_server.enabled = true
     config.public_file_server.headers = { 'Cache-Control' => 'public, max-age=3600' }
   else

spec/dummy/config/initializers/assets.rb

@@ -1,7 +1,7 @@
 # Be sure to restart your server when you modify this file.
 
 # Version of your assets, change this if you want to expire all your assets.
-if Rails.version.starts_with?("4")
+if Rails.version.start_with?("4")
   Rails.application.config.assets.version = '1.0'
 end
 

spec/lib/chatops/controller_spec.rb

@@ -60,7 +60,7 @@ def ensure_app_given
   end
 
   def rails_flexible_post(path, outer_params, jsonrpc_params = nil)
-    if Rails.version.starts_with?("4")
+    if Rails.version.start_with?("4")
       post path, outer_params.merge("params" => jsonrpc_params)
     else
       jsonrpc_params ||= {}