Revise version 3.0.3 release date

Updated the release date for version 3.0.3 and modified the minimum supported PHP version.

Set release date for version 3.0.0

Updated the release date for version 3.0.0 in the changelog.

Quantum 3.0.0-rc.1

Merge pull request #369 from armanist/master

Refactoring Toolkit module to correspond middlewares and use shorthand fasade functions

Merge pull request #326 from armanist/master

Correcting the way of grabbing raw param

Remove version field to fix Packagist warning

Merge pull request #288 from armanist/172-Database-transactions

Database transactions

Merge pull request #252 from Arno2005/master

Correcting asset path

Merge pull request #199 from armanist/master

Correcting the DebugBarCommand as of different package usage

Merge pull request #170 from armanist/master

Dropbox related refactoring and minor text changes