updated composer.json
Merge branch '1.0.0-RC1' of https://github.com/Webiny/Amazon
Merge pull request #2 from Webiny/1.0.0-RC1

Merge pull request #1 from Webiny/master
Merge branch 'master' of https://github.com/Webiny/Amazon
Merge pull request #3 from Webiny/master

updated composer dependency