fix: Merge pull request #98 from pelias/nodemailer

Revert to nodemailer 2.7.2

Author: orangejulius

package.json

@@ -31,7 +31,7 @@
     "is-object": "^1.0.1",
     "juice": "^4.0.0",
     "lodash": "^4.5.1",
-    "nodemailer": "^4.0.1",
+    "nodemailer": "^2.7.2",
     "nodemailer-ses-transport": "1.5.1",
     "pelias-config": "2.9.0",
     "request": "^2.55.0",