fix: revert Twilio message creation using create! instead of create (#118)

app/models/channel/twilio_sms.rb

@@ -52,7 +52,7 @@ class Channel::TwilioSms < ApplicationRecord
     params = send_message_from.merge(to: to, body: body)
     params[:media_url] = media_url if media_url.present?
     params[:status_callback] = twilio_delivery_status_index_url
-    client.messages.create!(**params)
+    client.messages.create(**params) # rubocop:disable Rails/SaveBang
   end
 
   private

spec/models/channel/twilio_sms_spec.rb

@@ -43,7 +43,7 @@ RSpec.describe Channel::TwilioSms do
     end
 
     it 'sends via twilio client' do
-      expect(twilio_messages).to receive(:create!).with(
+      expect(twilio_messages).to receive(:create).with(
         messaging_service_sid: channel.messaging_service_sid,
         to: '+15555550111',
         body: 'hello world',
@@ -57,7 +57,7 @@ RSpec.describe Channel::TwilioSms do
       let(:channel) { create(:channel_twilio_sms, :with_phone_number) }
 
       it 'sends via twilio client' do
-        expect(twilio_messages).to receive(:create!).with(
+        expect(twilio_messages).to receive(:create).with(
           from: channel.phone_number,
           to: '+15555550111',
           body: 'hello world',
@@ -70,7 +70,7 @@ RSpec.describe Channel::TwilioSms do
 
     context 'with media urls' do
       it 'supplies a media url' do
-        expect(twilio_messages).to receive(:create!).with(
+        expect(twilio_messages).to receive(:create).with(
           messaging_service_sid: channel.messaging_service_sid,
           to: '+15555550111',
           body: 'hello world',