IHF: nesbot/carbon dependency added, composer lock updated.

Author: dmitry-ivanov

composer.json

@@ -12,6 +12,7 @@
     "require": {
         "php": ">=5.5.9",
         "illuminate/support": "5.1.*|5.2.*|5.3.*|5.4.*",
+        "nesbot/carbon": "^1.19",
         "symfony/finder": "^2.7|^3.0",
         "symfony/process": "^2.7|^3.0",
         "symfony/var-dumper": "^2.7|^3.0",