Allow array of strings in to, bcc, cc, and replyTo options to sendEmail

Author: johanbrook

Diff for: lib/mailer.js

@@ -225,12 +225,12 @@ const factory = (options) => {
   // including the template name and optional data object.
   const sendEmail = (sendOptions) => {
     check(sendOptions, {
-      to: String,
+      to: Match.OneOf(String, [String]),
       subject: String,
       template: String,
-      cc: Match.Optional(String),
-      bcc: Match.Optional(String),
-      replyTo: Match.Optional(String),
+      cc: Match.Optional(Match.OneOf(String, [String])),
+      bcc: Match.Optional(Match.OneOf(String, [String])),
+      replyTo: Match.Optional(Match.OneOf(String, [String])),
       from: Match.Optional(String),
       data: Match.Optional(Object),
       headers: Match.Optional(Object)