Update dependencies to latest versions

vendor/github.com/google/go-github/AUTHORS

@@ -22,9 +22,11 @@ Allen Sun <shlallen1990@gmail.com>
 Amey Sakhadeo <me@ameyms.com>
 Andreas Garnæs <https://github.com/andreas>
 Andrew Ryabchun <aryabchun@mail.ua>
+Andy Grunwald <andygrunwald@gmail.com>
 Andy Hume <andyhume@gmail.com>
 Andy Lindeman <andy@lindeman.io>
 Anshuman Bhartiya <anshuman.bhartiya@gmail.com>
+Antoine <antoine.tu@mail.mcgill.ca>
 Antoine Pelisse <apelisse@gmail.com>
 Anubha Kushwaha <anubha_bt2k14@dtu.ac.in>
 appilon <apilon@hashicorp.com>
@@ -56,6 +58,7 @@ Craig Peterson <cpeterson@stackoverflow.com>
 Cristian Maglie <c.maglie@bug.st>
 Daehyeok Mun <daehyeok@gmail.com>
 Daniel Leavitt <daniel.leavitt@gmail.com>
+Daniel Nilsson <daniel.nilsson1989@gmail.com>
 Dave Du Cros <davidducros@gmail.com>
 Dave Henderson <dhenderson@gmail.com>
 David Deng <daviddengcn@gmail.com>
@@ -73,6 +76,7 @@ Eli Uriegas <seemethere101@gmail.com>
 Elliott Beach <elliott2.71828@gmail.com>
 Emerson Wood <emersonwood94@gmail.com>
 eperm <staffordworrell@gmail.com>
+Erick Fejta <erick@fejta.com>
 erwinvaneyk <erwinvaneyk@gmail.com>
 Fabrice <fabrice.vaillant@student.ecp.fr>
 Filippo Valsorda <hi@filippo.io>
@@ -85,6 +89,7 @@ George Kontridze <george.kontridze@gmail.com>
 Georgy Buranov <gburanov@gmail.com>
 Gnahz <p@oath.pl>
 Google Inc.
+Grachev Mikhail <work@mgrachev.com>
 griffin_stewie <panterathefamilyguy@gmail.com>
 Guillaume Jacquet <guillaume.jacquet@gmail.com>
 Guz Alexander <kalimatas@gmail.com>
@@ -117,6 +122,8 @@ Justin Abrahms <justin@abrah.ms>
 Jusung Lee <e.jusunglee@gmail.com>
 jzhoucliqr <jzhou@cliqr.com>
 Katrina Owen <kytrinyx@github.com>
+Kautilya Tripathi < tripathi.kautilya@gmail.com>
+Kautilya Tripathi <tripathi.kautilya@gmail.com>
 Keita Urashima <ursm@ursm.jp>
 Kevin Burke <kev@inburke.com>
 Konrad Malawski <konrad.malawski@project13.pl>
@@ -124,6 +131,7 @@ Kookheon Kwon <kucuny@gmail.com>
 Krzysztof Kowalczyk <kkowalczyk@gmail.com>
 Kshitij Saraogi <KshitijSaraogi@gmail.com>
 kyokomi <kyoko1220adword@gmail.com>
+Lovro Mažgon <lovro.mazgon@gmail.com>
 Lucas Alcantara <lucasalcantaraf@gmail.com>
 Luke Evers <me@lukevers.com>
 Luke Kysow <lkysow@gmail.com>
@@ -142,6 +150,7 @@ Michael Spiegel <michael.m.spiegel@gmail.com>
 Michael Tiller <michael.tiller@gmail.com>
 Michał Glapa <michal.glapa@gmail.com>
 Nathan VanBenschoten <nvanbenschoten@gmail.com>
+Navaneeth Suresh <navaneeths1998@gmail.com>
 Neil O'Toole <neilotoole@apache.org>
 Nick Miyake <nmiyake@palantir.com>
 Nick Spragg <nick.spragg@bbc.co.uk>
@@ -150,6 +159,7 @@ Noah Zoschke <noah+sso2@convox.com>
 ns-cweber <cweber@narrativescience.com>
 Oleg Kovalov <iamolegkovalov@gmail.com>
 Ondřej Kupka <ondra.cap@gmail.com>
+Palash Nigam <npalash25@gmail.com>
 Panagiotis Moustafellos <pmoust@gmail.com>
 Parham Alvani <parham.alvani@gmail.com>
 Parker Moore <parkrmoore@gmail.com>
@@ -171,6 +181,7 @@ Rob Figueiredo <robfig@yext.com>
 Rohit Upadhyay <urohit011@gmail.com>
 Ronak Jain <ronakjain@outlook.in>
 Ruben Vereecken <rubenvereecken@gmail.com>
+Ryan Leung <rleungx@gmail.com>
 Ryan Lower <rpjlower@gmail.com>
 Sahil Dua <sahildua2305@gmail.com>
 saisi <saisi@users.noreply.github.com>
@@ -184,10 +195,12 @@ Sebastian Mandrean <sebastian.mandrean@gmail.com>
 Sebastian Mæland Pedersen <sem.pedersen@stud.uis.no>
 Sevki <s@sevki.org>
 Shagun Khemka <shagun.khemka60@gmail.com>
+shakeelrao <shakeelrao79@gmail.com>
 Shawn Catanzarite <me@shawncatz.com>
 Shawn Smith <shawnpsmith@gmail.com>
 sona-tar <sona.zip@gmail.com>
 SoundCloud, Ltd.
+Sridhar Mocherla <srmocher@microsoft.com>
 Stian Eikeland <stian@eikeland.se>
 Tasya Aditya Rukmana <tadityar@gmail.com>
 Thomas Bruyelle <thomas.bruyelle@gmail.com>
@@ -198,6 +211,7 @@ Varadarajan Aravamudhan <varadaraajan@gmail.com>
 Victor Castell <victor@victorcastell.com>
 Victor Vrantchan <vrancean+github@gmail.com>
 Vlad Ungureanu <vladu@palantir.com>
+Wasim Thabraze <wasim@thabraze.me>
 Will Maier <wcmaier@gmail.com>
 William Bailey <mail@williambailey.org.uk>
 xibz <impactbchang@gmail.com>