add next.config.js for v3 next export example with-dynamic-import

[johhansantana]

Added working v3-beta version in package.json.

Also, example here has syntax error.

This is my first pull request here, I'm not sure if I'm doing the right way :l

[vinaypuppal]

@johhansantana Can you also fix this in Readme
from

curl https://codeload.github.com/zeit/next.js/tar.gz/master | tar -xz --strip=2 next.js-master/examples/shared-modules
cd shared-modules

to

curl https://codeload.github.com/zeit/next.js/tar.gz/master | tar -xz --strip=2 next.js-master/examples/with-dynamic-import
cd with-dynamic-import

[johhansantana]

@vinaypuppal done :D

[arunoda]

Guys thanks for this.
But for the dynamic import example we should add the next export settings.
Could you remove the stuff from the next config file.

[johhansantana]

Sorry for my ignorance but what is the next export settings ?

[vinaypuppal]

@johhansantana No need of this file examples/with-dynamic-import/next.config.js for this example as its only needed if we want to use next export. So @arunoda asked you to remove it.

[johhansantana]

ah! @vinaypuppal I think I was confused that this was the example for next export as it's at the end of the blog post

[arunoda]

This is great.
Thanks.