Support export default (Typescript related)

[DenisCarriere]

Support export default (Typescript related)

Mainly used for Typescript support, other bundlers like Rollup/Babel use some other "magic" to support default exports.

Same thing was done for concaveman & polylabel (PR mapbox/polylabel#10):

An update to the Typescript definition has already been made to reflect this change: DefinitelyTyped/DefinitelyTyped#20348

Rollup "magic" (import default)

import supercluster from 'supercluster'

Gets compile to:

'use strict';

function _interopDefault (ex) { return (ex && (typeof ex === 'object') && 'default' in ex) ? ex['default'] : ex; }

var supercluster = _interopDefault(require('supercluster'));

Rollup "no-magic" (import without default)

import * as supercluster from 'supercluster'

Gets compile to:

'use strict';

require('supercluster');

CC: @alex3165 @mourner

[DenisCarriere]

@mourner 👍 Do you mind if I send send more PR's to all your MANY other repos?

[mourner]

@DenisCarriere yeah, no harm from a change like this :)

[DenisCarriere]

@mourner Sounds good! Should I bump the package.json version while I'm at it? That way you just need to npm publish once merged

[mourner]

@DenisCarriere no, it's better for me to do npm version because it also creates a tag.

[DenisCarriere]

Oh gotcha! 👍 (maybe I should do the same when I publish my repos 😄 )

[DenisCarriere]

Expect ~5-10 PR's

[DenisCarriere]

@mourner Should be done now for the export default PR's, I've linked them all to this PR so we track them all here.

Thanks for the quick merges 👍