deps: upgrade npm to 2.7.3

PR-URL: #1219
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
Reviewed-By: Rod Vagg <rod@vagg.org>

deps/npm/.mailmap

@@ -8,13 +8,15 @@ Dalmais Maxence <root@ip-10-195-202-5.ec2.internal>
 David Beitey <david@davidjb.com>
 Domenic Denicola <domenic@domenicdenicola.com>
 Einar Otto Stangvik <einaros@gmail.com>
-Evan Lucas <evan@btc.com> <evanlucas@me.com> <evan.lucas@hattiesburgclinic.com>
+Evan Lucas <evan@btc.com> <evanlucas@me.com>
+Evan Lucas <evan@btc.com> <evan.lucas@hattiesburgclinic.com>
 Faiq Raza <faiqrazarizvi@gmail.com>
 Forbes Lindesay <forbes@lindesay.co.uk>
-Forrest L. Norvell <forrest@npmjs.com> <ogd@aoaioxxysz.net>
+Forrest L Norvell <ogd@aoaioxxysz.net> <forrest@npmjs.com>
 Gabriel Barros <descartavel1@gmail.com>
 Geoff Flarity <geoff.flarity@gmail.com> <gflarity@raptvm-x02.(none)>
 Isaac Z. Schlueter <i@izs.me> <i@foohack.com>
+Isaac Z. Schlueter <i@izs.me> isaacs <i@izs.me>
 Jake Verbaten <raynos2@gmail.com>
 James Sanders <jimmyjazz14@gmail.com>
 Jason Smith <jhs@iriscouch.com>
@@ -28,4 +30,4 @@ Nicolas Morel <marsup@gmail.com>
 Olivier Melcher <olivier.melcher@gmail.com>
 Visnu Pitiyanuvath <visnupx@gmail.com>
 Will Elwood <w.elwood08@gmail.com>
-Zeke Sikelianos <zeke@sikelianos.com>
+Zeke Sikelianos <zeke@sikelianos.com>