bump node-fetch and cross-fetch

Signed-off-by: Fredrik Adelöw <freben@gmail.com>

plugins/bitrise/package.json

@@ -29,7 +29,7 @@
     "@material-ui/core": "^4.12.2",
     "@material-ui/icons": "^4.9.1",
     "@material-ui/lab": "4.0.0-alpha.57",
-    "cross-fetch": "^3.0.6",
+    "cross-fetch": "^3.1.5",
     "lodash": "^4.17.21",
     "luxon": "^2.0.2",
     "qs": "^6.9.6",