vendor: Mega update all dependencies

GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/4080

vendor/github.com/gogo/protobuf/AUTHORS

@@ -1,14 +0,0 @@
-# This is the official list of GoGo authors for copyright purposes.
-# This file is distinct from the CONTRIBUTORS file, which
-# lists people.  For example, employees are listed in CONTRIBUTORS,
-# but not in AUTHORS, because the employer holds the copyright.
-
-# Names should be added to this file as one of
-#     Organization's name
-#     Individual's name <submission email address>
-#     Individual's name <submission email address> <email2> <emailN>
-
-# Please keep the list sorted.
-
-Vastech SA (PTY) LTD
-Walter Schulze <awalterschulze@gmail.com>