Use double pipe instead of deprecated single pipe

Author: fmasa

composer.json

@@ -4,7 +4,7 @@
     "require": {
 	"php": "^5.6 || ^7.0",
         "nette/di": "^2.3",
-        "nette/robot-loader": "^2.4.2|^3.0"
+        "nette/robot-loader": "^2.4.2 || ^3.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^5.7",