Fix unit test that broke due changes in Ios::VersionHelper

Author: iangmaia

spec/ios_bump_version_release_spec.rb

@@ -2,7 +2,7 @@
 
 describe Fastlane::Actions::IosBumpVersionReleaseAction do
   let(:default_branch) { 'my_new_branch' }
-  let(:versions) { ['6.30'] }
+  let(:version) { '6.30' }
   let(:next_version) { '6.31.0.0' }
   let(:next_version_short) { '6.31' }
 
@@ -15,7 +15,7 @@
       allow(Fastlane::Helper::GitHelper).to receive(:checkout_and_pull).with(default_branch)
       allow(Fastlane::Helper::GitHelper).to receive(:create_branch).with("release/#{next_version_short}", from: default_branch)
 
-      allow(Fastlane::Helper::Ios::VersionHelper).to receive(:get_version_strings).and_return(versions)
+      allow(Fastlane::Helper::Ios::VersionHelper).to receive(:read_from_config_file).and_return(version)
       allow(Fastlane::Helper::Ios::VersionHelper).to receive(:update_xc_configs).with(next_version, next_version_short, nil)
     end