fix: upgrade aws-sdk from 2.903.0 to 2.904.0 (#162)

Snyk has created this PR to upgrade aws-sdk from 2.903.0 to 2.904.0.

See this package in npm:
https://www.npmjs.com/package/aws-sdk

See this project in Snyk:
https://app.snyk.io/org/acinader/project/3364151b-9c9a-4458-9afd-809dc5309438?utm_source=github&utm_medium=upgrade-pr

Author: snyk-bot

package-lock.json

@@ -25,7 +25,7 @@
   },
   "homepage": "https://github.com/parse-community/parse-server-s3-adapter#readme",
   "dependencies": {
-    "aws-sdk": "2.903.0"
+    "aws-sdk": "2.904.0"
   },
   "devDependencies": {
     "parse": "2.19.0",