Fix NoMethodError with none Hash params

Author: ksss

lib/grape/validations/params_scope.rb

@@ -52,6 +52,7 @@ def meets_dependency?(params, request_params)
 
         return true unless @dependent_on
         return params.any? { |param| meets_dependency?(param, request_params) } if params.is_a?(Array)
+        return false unless params.respond_to?(:with_indifferent_access)
         params = params.with_indifferent_access
 
         @dependent_on.each do |dependency|

spec/grape/validations/params_scope_spec.rb

@@ -700,6 +700,26 @@ def initialize(value)
   end
 
   context 'when validations are dependent on a parameter within an array param' do
+    before do
+      subject.params do
+        requires :foos, type: Array do
+          optional :foo
+          given :foo do
+            requires :bar
+          end
+        end
+      end
+      subject.get('/test') { 'ok' }
+    end
+
+    it 'should pass none Hash params' do
+      get '/test', foos: ['']
+      expect(last_response.status).to eq(200)
+      expect(last_response.body).to eq('ok')
+    end
+  end
+
+  context 'when validations are dependent on a parameter within an array param within #declared(params).to_json' do
     before do
       subject.params do
         requires :foos, type: Array do