Fix typo in default acl param

[codemanki]

Hello.

Pretty annoying typo. If you use default settings to upload image, aws will return an error saying:

{
  Code: 'InvalidArgument',
  Message: '',
  ArgumentName: 'x-amz-acl',
  ArgumentValue: 'privat',
  RequestId: '*****',
  HostId: '****' 
}

And just to be 100% sure, here http://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectPUT.html#rest-object-put-access-permissions privat is not listed as valid value for x-amz-acl:

Valid Values: private | public-read | public-read-write | ....

Hope this helps ;)

[Starefossen]

Thank you for finding and fixing this bug @codemanki 👍

[Starefossen]

s3-uploader v1.0.1 have been published to npm with this fix.

[codemanki]

@Starefossen thanks ;) !