fix: Avoid method redefinition warnings.

These are harmless but I'm trying to get my application warning free because warnings tend to
point nasty bugs.

```
lib/twilio-ruby/util/configuration.rb:8: warning: method redefined; discarding old account_sid=
lib/twilio-ruby/util/configuration.rb:12: warning: method redefined; discarding old auth_token=
lib/twilio-ruby/util/configuration.rb:16: warning: method redefined; discarding old http_client=
lib/twilio-ruby/util/configuration.rb:20: warning: method redefined; discarding old region=
lib/twilio-ruby/util/configuration.rb:24: warning: method redefined; discarding old edge=
lib/twilio-ruby/util/configuration.rb:28: warning: method redefined; discarding old logger=
```

There are a number of warnings left but I can't fix them because they are in generated code.

Almost all of them have to do witht the `context` method:

```
lib/twilio-ruby/rest/studio/v1/flow/engagement.rb:321: warning: method redefined; discarding old context
lib/twilio-ruby/rest/studio/v1/flow/engagement.rb:282: warning: previous definition of context was here
lib/twilio-ruby/rest/studio/v1/flow/engagement/engagement_context.rb:162: warning: method redefined; discarding old context
lib/twilio-ruby/rest/studio/v1/flow/engagement/engagement_context.rb:143: warning: previous definition of context was here
lib/twilio-ruby/rest/studio/v1/flow/engagement/step.rb:293: warning: method redefined; discarding old context
lib/twilio-ruby/rest/studio/v1/flow/engagement/step.rb:249: warning: previous definition of context was here
lib/twilio-ruby/rest/studio/v1/flow/engagement/step/step_context.rb:170: warning: method redefined; discarding old context
lib/twilio-ruby/rest/studio/v1/flow/engagement/step/step_context.rb:150: warning: previous definition of context was here
lib/twilio-ruby/rest/studio/v1/flow/execution.rb:367: warning: method redefined; discarding old context
lib/twilio-ruby/rest/studio/v1/flow/execution.rb:328: warning: previous definition of context was here
lib/twilio-ruby/rest/studio/v1/flow/execution/execution_context.rb:163: warning: method redefined; discarding old context
lib/twilio-ruby/rest/studio/v1/flow/execution/execution_context.rb:144: warning: previous definition of context was here
lib/twilio-ruby/rest/studio/v1/flow/execution/execution_step.rb:299: warning: method redefined; discarding old context
lib/twilio-ruby/rest/studio/v1/flow/execution/execution_step.rb:255: warning: previous definition of context was here
lib/twilio-ruby/rest/studio/v1/flow/execution/execution_step/execution_step_context.rb:173: warning: method redefined; discarding old context
lib/twilio-ruby/rest/studio/v1/flow/execution/execution_step/execution_step_context.rb:153: warning: previous definition of context was here
lib/twilio-ruby/rest/studio/v2/flow/execution.rb:360: warning: method redefined; discarding old context
lib/twilio-ruby/rest/studio/v2/flow/execution.rb:327: warning: previous definition of context was here
lib/twilio-ruby/rest/studio/v2/flow/execution/execution_context.rb:163: warning: method redefined; discarding old context
lib/twilio-ruby/rest/studio/v2/flow/execution/execution_context.rb:144: warning: previous definition of context was here
lib/twilio-ruby/rest/studio/v2/flow/execution/execution_step.rb:299: warning: method redefined; discarding old context
lib/twilio-ruby/rest/studio/v2/flow/execution/execution_step.rb:255: warning: previous definition of context was here
lib/twilio-ruby/rest/studio/v2/flow/execution/execution_step/execution_step_context.rb:173: warning: method redefined; discarding old context
lib/twilio-ruby/rest/studio/v2/flow/execution/execution_step/execution_step_context.rb:153: warning: previous definition of context was here
lib/twilio-ruby/twiml/voice_response.rb:794: warning: method redefined; discarding old initialize
lib/twilio-ruby/twiml/messaging_response.rb:50: warning: previous definition of initialize was here
```

lib/twilio-ruby/util/configuration.rb

@@ -3,7 +3,7 @@
 module Twilio
   module Util
     class Configuration
-      attr_accessor :account_sid, :auth_token, :http_client, :region, :edge, :logger
+      attr_reader :account_sid, :auth_token, :http_client, :region, :edge, :logger
 
       def account_sid=(value)
         @account_sid = value

spec/rack/twilio_webhook_authentication_spec.rb

@@ -38,7 +38,7 @@
       expect(Twilio::Security::RequestValidator).to receive(:new).with(auth_token).and_return(request_validator)
       expect(request_validator).to receive(:validate).and_return(true)
       request = Rack::MockRequest.env_for('/voice')
-      status, headers, body = @middleware.call(request)
+      status, _headers, _body = @middleware.call(request)
       expect(status).to be(200)
     end
   end
@@ -51,7 +51,7 @@
     it 'should not intercept when the path doesn\'t match' do
       expect(Twilio::Security::RequestValidator).to_not receive(:validate)
       request = Rack::MockRequest.env_for('/sms')
-      status, headers, body = @middleware.call(request)
+      status, _headers, _body = @middleware.call(request)
       expect(status).to be(200)
     end
 
@@ -60,7 +60,7 @@
         receive(:validate).and_return(true)
       )
       request = Rack::MockRequest.env_for('/voice')
-      status, headers, body = @middleware.call(request)
+      status, _headers, _body = @middleware.call(request)
       expect(status).to be(200)
     end
 
@@ -69,7 +69,7 @@
         receive(:validate).and_return(false)
       )
       request = Rack::MockRequest.env_for('/voice')
-      status, headers, body = @middleware.call(request)
+      status, _headers, _body = @middleware.call(request)
       expect(status).to be(403)
     end
   end
@@ -82,7 +82,7 @@
     it 'should not intercept when the path doesn\'t match' do
       expect(Twilio::Security::RequestValidator).to_not receive(:validate)
       request = Rack::MockRequest.env_for('icesms')
-      status, headers, body = @middleware.call(request)
+      status, _headers, _body = @middleware.call(request)
       expect(status).to be(200)
     end
 
@@ -91,7 +91,7 @@
         receive(:validate).and_return(true)
       )
       request = Rack::MockRequest.env_for('/sms')
-      status, headers, body = @middleware.call(request)
+      status, _headers, _body = @middleware.call(request)
       expect(status).to be(200)
     end
 
@@ -100,7 +100,7 @@
         receive(:validate).and_return(false)
       )
       request = Rack::MockRequest.env_for('/sms')
-      status, headers, body = @middleware.call(request)
+      status, _headers, _body = @middleware.call(request)
       expect(status).to be(403)
     end
   end
@@ -118,7 +118,7 @@
       request['HTTP_X_TWILIO_SIGNATURE'] = '+LYlbGr/VmN84YPJQCuWs+9UA7E='
       request['CONTENT_TYPE'] = 'application/json'
 
-      status, headers, body = middleware.call(request)
+      status, _headers, _body = middleware.call(request)
 
       expect(status).not_to be(200)
     end
@@ -135,7 +135,7 @@
       request['HTTP_X_TWILIO_SIGNATURE'] = 'zR5Oq4f6cijN5oz5bisiVuxYnTU='
       request['CONTENT_TYPE'] = 'application/json'
 
-      status, headers, body = middleware.call(request)
+      status, _headers, _body = middleware.call(request)
 
       expect(status).to be(200)
     end
@@ -153,7 +153,7 @@
       request['CONTENT_TYPE'] = 'application/json'
       request['rack.input'].read
 
-      status, headers, body = middleware.call(request)
+      status, _headers, _body = middleware.call(request)
 
       expect(status).to be(200)
     end
@@ -171,7 +171,7 @@
       request['HTTP_X_TWILIO_SIGNATURE'] = 'foobarbaz'
       expect(request['CONTENT_TYPE']).to eq('application/x-www-form-urlencoded')
 
-      status, headers, body = middleware.call(request)
+      status, _headers, _body = middleware.call(request)
 
       expect(status).not_to be(200)
     end
@@ -187,7 +187,7 @@
       request['HTTP_X_TWILIO_SIGNATURE'] = 'TR9Skm9jiF4WVRJznU5glK5I83k='
       expect(request['CONTENT_TYPE']).to eq('application/x-www-form-urlencoded')
 
-      status, headers, body = middleware.call(request)
+      status, _headers, _body = middleware.call(request)
 
       expect(status).to be(200)
     end

spec/spec_helper.rb

@@ -1,3 +1,5 @@
+$VERBOSE = true
+
 if RUBY_VERSION.start_with?('3.0')
   require 'simplecov'
   require 'simplecov_json_formatter'