deps: upgrade npm to 2.7.4

deps/npm/.mailmap

@@ -1,5 +1,6 @@
 Arlo Breault <[email protected]>
 Alex K. Wolfe <[email protected]>
+Andrew Bradley <[email protected]>
 Andrew Lunny <[email protected]>
 Benjamin Coe <[email protected]>
 Brian White <[email protected]> <[email protected]>
@@ -8,16 +9,19 @@ Dalmais Maxence <[email protected]>
 David Beitey <[email protected]>
 Domenic Denicola <[email protected]>
 Einar Otto Stangvik <[email protected]>
-Evan Lucas <[email protected]> <[email protected]> <[email protected]>
+Evan Lucas <[email protected]> <[email protected]>
+Evan Lucas <[email protected]> <[email protected]>
 Faiq Raza <[email protected]>
 Forbes Lindesay <[email protected]>
-Forrest L. Norvell <[email protected]> <[email protected]>
+Forrest L Norvell <[email protected]> <[email protected]>
 Gabriel Barros <[email protected]>
 Geoff Flarity <[email protected]> <gflarity@raptvm-x02.(none)>
 Isaac Z. Schlueter <[email protected]> <[email protected]>
+Isaac Z. Schlueter <[email protected]> isaacs <[email protected]>
 Jake Verbaten <[email protected]>
 James Sanders <[email protected]>
 Jason Smith <[email protected]>
+Jonas Weber <[email protected]>
 Kris Windham <[email protected]>
 Lin Clark <[email protected]>
 Maciej Małecki <[email protected]> <[email protected]>
@@ -26,6 +30,9 @@ Maxim Bogushevich <[email protected]>
 Max Goodman <[email protected]>
 Nicolas Morel <[email protected]>
 Olivier Melcher <[email protected]>
+Ryan Emery <[email protected]>
+Sam Mikes <[email protected]>
+Tony <[email protected]>
 Visnu Pitiyanuvath <[email protected]>
 Will Elwood <[email protected]>
-Zeke Sikelianos <[email protected]>
+Zeke Sikelianos <[email protected]>