Add es module#7

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YerkoPalma wants to merge 4 commits intomasterfrom

Commits on Oct 16, 2018

add es module
YerkoPalma
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Commits on Oct 17, 2018

use .mjs extension

yoshuawuyts
authored and
YerkoPalma
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use microbundle
YerkoPalma
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build files before tests
YerkoPalma
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