change os.tmpDir() to os.tmpdir()

fixes deprecation warnings
webtorrent · feross · Feb 12, 2017 · Feb 12, 2017 · Feb 12, 2017 · d0ff190e718a9f486b350dae2795f57554962624
commit d0ff190e718a9f486b350dae2795f57554962624
diff --git a/lib/torrent.js b/lib/torrent.js
@@ -58,7 +58,7 @@ var TMP
 try {
   TMP = path.join(fs.statSync('/tmp') && '/tmp', 'webtorrent')
 } catch (err) {
-  TMP = path.join(typeof os.tmpDir === 'function' ? os.tmpDir() : '/', 'webtorrent')
+  TMP = path.join(typeof os.tmpdir === 'function' ? os.tmpdir() : '/', 'webtorrent')
 }
 
 inherits(Torrent, EventEmitter)