Mock is_uploaded_file function for Symfony\Component\HttpFoundation\File namespace

[jetexe]

Q	A
Bug fix?	Yes
New feature?	Yes

Description

When you try to validate uploaded file by Laravel you will always get validation error becouse Symfony use is_uploaded_file function to validate file.

Now we can mock this function just for Symfony\Component\HttpFoundation\File. It will always return true

Fixes #10

Checklist

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I wrote unit tests for my code
• [x] I have made changes in CHANGELOG.md file

[tarampampam]

Looks great! Thx!

[tarampampam]

Merged into temporary branch for some changes