change: updated the luarocks version to 0.3.

Author: membphis

lua-resty-etcd-0.2-0.rockspec renamed to lua-resty-etcd-0.3-0.rockspec

@@ -1,8 +1,8 @@
 package = "lua-resty-etcd"
-version = "0.2-0"
+version = "0.3-0"
 source = {
    url = "git://github.com/iresty/lua-resty-etcd",
-   tag = "v0.2"
+   tag = "v0.3"
 }
 description = {
    summary = "Nonblocking Lua etcd driver library for OpenResty",