Merge pull request #119 from liaogz82/update-fastlane-docs

Update information on the use of new fastlane gem lizard

Author: zippy1978

docs/sonarqube-fastlane.md

@@ -2,11 +2,14 @@
 
 If you already use fastlane, you can simply setup a new lane performing the analysis as follows:
 
+Add `fastlane-plugin-lizard` gem into `Gemfile`, run `bundle install`
+
+Then add the following lane.
 ```ruby
 lane :metrics do
     scan(scheme: "[SCHEME]", code_coverage: true, derived_data_path: "./DerivedData", output_directory: "./reports")
     slather(cobertura_xml: true, jenkins: true, scheme: "[SCHEME]", build_directory: "./DerivedData", output_directory: "./reports", proj: "./[PROJECT].xcodeproj")
-    sh("cd .. && lizard ./[SOURCE_FOLDER] -l swift --xml > ./reports/lizard-report.xml")
+    lizard(source_folder: "[SOURCE_FOLDER]", language: "swift", export_type: "xml", report_file: "report/lizard-report.xml")
     swiftlint(output_file: "./reports/swiftlint.txt", ignore_exit_status: true)
     sonar
 end