Fix ruby 2.7 deprecation warnings

lib/stripe_mock/api/client.rb

@@ -8,7 +8,7 @@ def self.start_client(port=4999)
     return false if @state == 'live'
     return @client unless @client.nil?
 
-    Stripe::StripeClient.send(:define_method, :execute_request) { |*args| StripeMock.redirect_to_mock_server(*args) }
+    Stripe::StripeClient.send(:define_method, :execute_request) { |*args, **keyword_args| StripeMock.redirect_to_mock_server(*args, **keyword_args) }
     @client = StripeMock::Client.new(port)
     @state = 'remote'
     @client

lib/stripe_mock/api/instance.rb

@@ -7,7 +7,7 @@ module StripeMock
   def self.start
     return false if @state == 'live'
     @instance = instance = Instance.new
-    Stripe::StripeClient.send(:define_method, :execute_request) { |*args| instance.mock_request(*args) }
+    Stripe::StripeClient.send(:define_method, :execute_request) { |*args, **keyword_args| instance.mock_request(*args, **keyword_args) }
     @state = 'local'
   end
 

lib/stripe_mock/client.rb

@@ -18,7 +18,8 @@ def mock_request(method, url, api_key: nil, params: {}, headers: {})
         @pipe.mock_request(method, url, api_key: api_key, params: params, headers: headers).tap {|result|
           response, api_key = result
           if response.is_a?(Hash) && response[:error_raised] == 'invalid_request'
-            raise Stripe::InvalidRequestError.new(*response[:error_params])
+            args, keyword_args = response[:error_params].first(2), response[:error_params].last
+            raise Stripe::InvalidRequestError.new(*args, **keyword_args)
           end
         }
       end

lib/stripe_mock/request_handlers/charges.rb

@@ -146,7 +146,7 @@ def ensure_required_params(params)
         elsif non_positive_charge_amount?(params)
           raise Stripe::InvalidRequestError.new('Invalid positive integer', 'amount', http_status: 400)
         elsif params[:source].nil? && params[:customer].nil?
-          raise Stripe::InvalidRequestError.new('Must provide source or customer.', http_status: nil)
+          raise Stripe::InvalidRequestError.new('Must provide source or customer.', nil, http_status: nil)
         end
       end
 

lib/stripe_mock/request_handlers/ephemeral_key.rb

@@ -6,7 +6,7 @@ def self.included(klass)
       end
 
       def create_ephemeral_key(route, method_url, params, headers)
-        Data.mock_ephemeral_key(params)
+        Data.mock_ephemeral_key(**params)
       end
     end
   end

lib/stripe_mock/request_handlers/payment_methods.rb

@@ -51,7 +51,7 @@ def get_payment_methods(route, method_url, params, headers)
 
         Data.mock_list_object(clone.values, params)
       end
-      
+
       # post /v1/payment_methods/:id/attach
       def attach_payment_method(route, method_url, params, headers)
         allowed_params = [:customer]
@@ -86,6 +86,7 @@ def update_payment_method(route, method_url, params, headers)
         if payment_method[:customer].nil?
           raise Stripe::InvalidRequestError.new(
             'You must save this PaymentMethod to a customer before you can update it.',
+            nil,
             http_status: 400
           )
         end
@@ -104,6 +105,7 @@ def ensure_payment_method_required_params(params)
         if invalid_type?(params[:type])
           raise Stripe::InvalidRequestError.new(
             'Invalid type: must be one of card, ideal or sepa_debit',
+            nil,
             http_status: 400
           )
         end