update: adding timeout

sib_util.lib.lua

 local json = require "util.json";
 local promise = require "util.promise";
 local http = require "net.http";
+http.TIMEOUT = 340
+
 local errors = require "util.error".init("sib_util", {
 	["no-api"] = { status_code = 503, body = "API returned error" };
 	["invalid-json"] = { status_code = 400, body = "Invalid JSON" };