Update rebar.config

Fixed mismatch version from Makefile and rebar.config

rebar.config

@@ -1,4 +1,4 @@
 {deps, [
-    {mysql, ".*", {git, "https://github.com/mysql-otp/mysql-otp.git", {tag, "0.9.0"}}},
+    {mysql, ".*", {git, "https://github.com/mysql-otp/mysql-otp.git", {tag, "1.0.0"}}},
     {poolboy, ".*", {git, "https://github.com/devinus/poolboy.git", {tag, "1.5.1"}}}
 ]}.