fix: upgrade parse from 2.14.0 to 2.15.0 (#101)

Snyk has created this PR to upgrade parse from 2.14.0 to 2.15.0.

See this package in npm:
https://www.npmjs.com/package/parse

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

@@ -26,7 +26,7 @@
   "homepage": "https://github.com/parse-community/parse-server-s3-adapter#readme",
   "dependencies": {
     "aws-sdk": "2.709.0",
-    "parse": "2.14.0"
+    "parse": "2.15.0"
   },
   "devDependencies": {
     "codecov": "3.7.1",