fix(package): update dotenv to version 8.0.0

Closes #21

Author: greenkeeper[bot]

package.json

@@ -56,7 +56,7 @@
     "class-transformer": "^0.1.8",
     "class-validator": "^0.8.0",
     "connection-string": "^0.4.1",
-    "dotenv": "^5.0.0",
+    "dotenv": "^8.0.0",
     "jsonwebtoken": "^8.1.0",
     "node-django-hashers": "^1.0.9",
     "redis": "^2.8.0",