Update AUTHORS,CHANGELOG,CMakeLists.txt for v3.1.3

BUG=aomedia:3157

Change-Id: I54f7bce64b24205feb1e20fd997519e271669bce

AUTHORS

diff --git a/AUTHORS b/AUTHORS
index f645f59..9fa00fa 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -139,6 +139,7 @@
 Lester Lu <kslu@google.com>
 liang zhao <leolzhao@tencent.com>
 Linfeng Zhang <linfengz@google.com>
+Link.Meng <monthev@gmail.com>
 Logan Goldberg <logangw@google.com>
 Lokeshwar Reddy B <lokeshwar.reddy@ittiam.com>
 Lou Quillio <louquillio@google.com>

CHANGELOG

diff --git a/CHANGELOG b/CHANGELOG
index f901c43..875fad4 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,20 @@
+2021-09-29 v3.1.3
+  This release includes several bug fixes.
+
+  - Bug fixes:
+    Issue 3147: Build failure on Apple M1 arm64
+
+    The following four cmake changes should help the people building
+    libaom using MSVC.
+      1. exports: use CMAKE_SHARED_LIBRARY_PREFIX to determine lib name
+         https://aomedia-review.googlesource.com/c/aom/+/142342
+      2. aom_install: Install lib dlls to bindir
+         https://aomedia-review.googlesource.com/c/aom/+/146546
+      3. aom_install: use relpath for install
+         https://aomedia-review.googlesource.com/c/aom/+/146550
+      4. aom_install: don't exclude msvc from install
+         https://aomedia-review.googlesource.com/c/aom/+/146547
+
 2021-07-20 v3.1.2
   This release includes several bug fixes.
 

CMakeLists.txt

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 26dd379..bcf8965 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -43,7 +43,7 @@
 #
 # We set SO_FILE_VERSION = [c-a].a.r
 set(LT_CURRENT 4)
-set(LT_REVISION 2)
+set(LT_REVISION 3)
 set(LT_AGE 1)
 math(EXPR SO_VERSION "${LT_CURRENT} - ${LT_AGE}")
 set(SO_FILE_VERSION "${SO_VERSION}.${LT_AGE}.${LT_REVISION}")