bump version of lager to 2.2.3

fixes #37

Author: paulperegud

rebar.config

@@ -4,6 +4,6 @@
 
 {erl_opts, [debug_info, warnings_as_errors, {parse_transform, lager_transform}, {platform_define, "^[1-9]", otp17orNewer}]}.
 
-{deps, [{lager, ".*", {git, "git://github.com/basho/lager", {tag, "2.0.1"}}},
+{deps, [{lager, ".*", {git, "git://github.com/basho/lager", {tag, "2.2.3"}}},
         {druuid, ".*", {git, "git://github.com/kellymclaughlin/druuid.git", {tag, "0.2"}}} 
 ]}.