fix(package): update dotenv to version 8.0.0

Author: greenkeeper[bot]

package.json

@@ -47,7 +47,7 @@
     "chalk": "2.4.2",
     "chokidar": "^3.0.0",
     "decompress": "4.2.0",
-    "dotenv": "^7.0.0",
+    "dotenv": "^8.0.0",
     "fs-extra": "7.0.0",
     "glob": "7.1.2",
     "glob-to-regexp": "0.4.1",