Fix TZ aliases not working

[deecewan]

Currently, when the timezone data is loaded, the loading function tries to enrich the metazone data which will allow for name aliases of the timezone to refer to the same metazone.

Unfortunately, the build script was concatenating the imports incorrectly so the TZ data was imported before the metazone data so the matching metazone was never found.

It's not possible (in my understanding of the code base) to write a test to assert this behaviour. In the tests, the metazone is run before the tzdata so it is in the correct order.

Before:

// build/src/index.js
/*
 * Copyright 2017, Yahoo Inc.
 * Copyrights licensed under the New BSD License.
 * See the accompanying LICENSE file for terms.
 */
var myGlobal = (typeof global !== "undefined" && {}.toString.call(global) === '[object global]') ? global : window;
(require('./code/polyfill.js').default)(myGlobal);
(require('./code/data-loader.js').default)(myGlobal);
(require('./data/tzdata.js'))(myGlobal);
(require('./data/metazone.js'))(myGlobal);
(require('./data/locale.js'))(myGlobal);
module.exports = myGlobal.Intl.DateTimeFormat;

After:

// build/src/index.js
/*
 * Copyright 2017, Yahoo Inc.
 * Copyrights licensed under the New BSD License.
 * See the accompanying LICENSE file for terms.
 */
var myGlobal = (typeof global !== "undefined" && {}.toString.call(global) === '[object global]') ? global : window;
(require('./code/polyfill.js').default)(myGlobal);
(require('./code/data-loader.js').default)(myGlobal);
(require('./data/metazone.js'))(myGlobal);
(require('./data/locale.js'))(myGlobal);
(require('./data/tzdata.js'))(myGlobal);
module.exports = myGlobal.Intl.DateTimeFormat;

[yahoocla]

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[deecewan]

fyi @juandopazo - not sure how this was never picked up before, but I was getting errors when running with the timezone name Australia/Canberra. After the changes, it works as expected.

[benmccann]

@markandey would you be able to take a look at this PR?