change url for tz database

[madsheep]

This is crashing for everybody this morning since data_loader is not following redirects:

Application phoenix started on node 'node@localhost'
Application tzdata exited: exited in: Tzdata.App.start(:normal, [])
    ** (EXIT) an exception was raised:
        ** (MatchError) no match of right hand side value: {:error, {:shutdown, {:failed_to_start_child, Tzdata.EtsHolder, {{:badmatch, {:ok, 302, [{"Date", "Wed, 22 Nov 2017 06:13:39 GMT"}, {"X-Frame-Options", "SAMEORIGIN"}, {"Content-Security-Policy", "upgrade-insecure-requests"}, {"Location", "https://data.iana.org/time-zones/tzdata-latest.tar.gz"}, {"Cache-Control", "public, s-maxage=600, max-age=3600"}, {"Expires", "Wed, 22 Nov 2017 07:13:39 GMT"}, {"Content-Length", "0"}, {"content-type", "application/x-gzip"}, {"Server", "Apache"}, {"Strict-Transport-Security", "max-age=48211200; preload"}, {"X-Cache-Hits", "117"}, {"Connection", "keep-alive"}], #Reference<0.0.7.772>}}, [{Tzdata.DataLoader, :download_new, 1, [file: 'lib/tzdata/data_loader.ex', line: 10]}, {Tzdata.DataBuilder, :load_and_save_table, 0, [file: 'lib/tzdata/data_builder.ex', line: 9]}, {Tzdata.EtsHolder, :init, 1, [file: 'lib/tzdata/ets_holder.ex', line: 10]}, {:gen_server, :init_it, 6, [file: 'gen_server.erl', line: 328]}, {:proc_lib, :init_p_do_apply, 3, [file: 'proc_lib.erl', line: 247]}]}}}}
            (tzdata) lib/tzdata/tzdata_app.ex:15: Tzdata.App.start/2
            (kernel) application_master.erl:273: :application_master.start_it_old/4

The included change of url is the easiest way to address it, but I suggest making this a little bit less prone to errors by using hackneys 'follow redirects' option.

[madsheep]

Fixes: #50

[maennchen]

Maybe we should also pass follow_redirect: true to hackney. IANA did a 302 for the file and the library could've continued to work.

[madsheep]

Didn't I mention that in the PRs description already? :P I wanted @lau to have his say before we change more but I guess this is a no-brainer improvement. Let me commit that quickly...

[maennchen]

@madsheep You‘re right. Sorry about that.

[madsheep]

All good ;) let's wait for Lau to see this, meanwhile I suggest using my fork in your mix deps.

[lau]

❤️ 💚 💙 💛 💜

[lau]

Version 0.5.14 has been released.