Appveyor: stop testing on VS 2013
authorLei Zhang <antiagainst@google.com>
Tue, 12 Dec 2017 15:46:39 +0000 (10:46 -0500)
committerLei Zhang <antiagainst@google.com>
Tue, 12 Dec 2017 18:27:21 +0000 (13:27 -0500)
commit2fc1221c3d9751ff69d8aaa3d25645c13e234af6
treed8268a71dffdf8fe191e7b5935abb7ceba4733b1
parentc520d43649f5b194a4beee3344e4439fb0fdc9de
Appveyor: stop testing on VS 2013

re2 requires VS2015 or later since:

https://github.com/google/re2/commit/97957299d1c9f7617cfe653f344536d733582d9e
.appveyor.yml