fix(package): fix deprecated api

Signed-off-by: Josef Fröhle <[email protected]>

Author: Josef Fröhle

lib/openssl.js

@@ -1,4 +1,3 @@
-var Buffer = require('buffer')
 var helper = require('./helper.js')
 var cpspawn = require('child_process').spawn
 var pathlib = require('path')

lib/pem.js

@@ -6,7 +6,6 @@
  * @module pem
  */
 
-var Buffer = require('safe-buffer').Buffer
 var net = require('net')
 var helper = require('./helper.js')
 var openssl = require('./openssl.js')