npm: upgrade to 1.4.3

So many bug fixing.

* npm/npm@1564bd1 v1.4.3 (isaacs)
* npm/npm@550e38c graceful-fs@2.0.2 (isaacs)
* npm/npm@059b2bf serialize shrinkwrap payload in order (Raynos (Jake Verbaten))
* npm/npm@55f9ae3 assert that only files we locked get unlocked (Neil Gentleman)
* npm/npm@164b97e clean git url before locking (Neil Gentleman)
* npm/npm@9575a23 npm outdated --parseable fix (Younghoon Park)
* npm/npm@8ebe852 more legible error message in config.get/set (Yazhong Liu)
* npm/npm@d4f6f3f Respect --color settings in outdated. (Tim Oxley)
* npm/npm@5e5e89f outdated: optimize out an extra HTTP request (isaacs)
* npm/npm@62417bc nopt@2.2.0 (isaacs)
* npm/npm@f851b79 Check for file-ness in /-containing install args (isaacs)
* npm/npm@46d8768 "install ./pkg@1.2.3" should install local module (Alex Kocharin)
* npm/npm@9ae71de npm-registry-client@0.4.4 (isaacs)
* npm/npm@0a3151c default to ^ instead of ~ (Mikola Lysenko)
* npm/npm@acc4d02 prune: Added back --production support (Dav Glass)
* npm/npm@86028e9 dedupe: respect dependency versions (Rafael de Oleza)
* npm/npm@09223de Forbid deleting important npm dirs (isaacs)
* npm/npm@401a642 link: do not allow linking unnamed packages (isaacs)
* npm/npm@bb6fb4d read-installed@1.0.0 (isaacs)
* npm/npm@3ce6905 view: remove arbitrary cache limit (isaacs)