Add strictSSL option to support node.js v0.8+

rejectUnauthorized was introduced in node 0.8 
if the https module doesn't find a trusted certificate 
(like splunk self generated case) then it fails to connect 
giving a "Error: SELF_SIGNED_CERT_IN_CHAIN" message.

Request module already provide strictSSL option to prevent this problem 
(I test on v2.16.3) but it's not work with version require by this sdk (v2.9.152).
You need to upgrade request module to work with this fix