Add phpdotenv required for unit tests

Author: jessarcher

composer.json

@@ -21,7 +21,8 @@
   "require": {
     "php": "^7.0",
     "illuminate/support": "~5.0",
-    "illuminate/console": "~5.0"
+    "illuminate/console": "~5.0",
+    "vlucas/phpdotenv": "^3.5"
   },
   "suggest": {
     "geoip2/geoip2": "Required to use the MaxMind database or web service with GeoIP (~2.1).",