add xcov report

RecipeApp/Dangerfile

@@ -6,8 +6,15 @@ declared_trivial = github.pr_title.include? "#trivial"
 warn("PR is classed as Work in Progress") if github.pr_title.include? "[WIP]"
 
 # Warn when there is a big PR
-warn("Big PR") if git.lines_of_code < 500
+warn("Big PR") if git.lines_of_code > 500
 
 # Don't let testing shortcuts get into master by accident
 fail("fdescribe left in tests") if `grep -r fdescribe specs/ `.length > 1
 fail("fit left in tests") if `grep -r fit specs/ `.length > 1
+
+xcov.report(
+    workspace: "RecipeApp.xcworkspace",
+    scheme: "RecipeApp",
+    output_directory: "fastlane/xcov_output",
+    minimum_coverage_percentage: 80.0
+)