Update dependency mysql-otp 1.3.1

Makefile

@@ -1,5 +1,5 @@
 PROJECT = mysql_poolboy
 DEPS = mysql poolboy
-dep_mysql = git https://github.com/mysql-otp/mysql-otp.git 1.3.0
+dep_mysql = git https://github.com/mysql-otp/mysql-otp.git 1.3.1
 dep_poolboy = git https://github.com/devinus/poolboy.git 1.5.1
 include erlang.mk

rebar.config

@@ -1,4 +1,4 @@
 {deps, [
-    {mysql, ".*", {git, "https://github.com/mysql-otp/mysql-otp.git", {tag, "1.3.0"}}},
+    {mysql, ".*", {git, "https://github.com/mysql-otp/mysql-otp.git", {tag, "1.3.1"}}},
     {poolboy, ".*", {git, "https://github.com/devinus/poolboy.git", {tag, "1.5.1"}}}
 ]}.