Laravel version bug fixed and README updated

Signed-off-by: Aykut Farsak <aykutfarsak@gmail.com>
Merge pull request #3 from aykutfarsak/bug-fix

Laravel version bug fixed and README updated
Fixed an issue with the recent PR and added a test to make sure the provider works when no config is provided
config bug fixed

add a empty config array to test app
CS fix