Update run-tests script

run-tests.sh

 #!/bin/sh
 set -e
 
+echo "\n\033[1;32m▶ Xcode version\033[0m"
+xcodebuild -version
+
 if [ ! -n "$1" ]; then
 
   echo "\n\033[1;32m▶ Running package tests on iOS Simulator...\033[0m"
@@ -13,7 +16,7 @@ elif [ "$1" = "examples" ]; then
 
 else
 
-  echo "Invalid option. Usage:"
+  echo "\n\033[1;31m▶ Invalid option.\033[0m Usage:"
   echo "  run-tests.sh          - Run package tests"
   echo "  run-tests.sh examples - Run examples tests"
   exit 1