bump load-grunt-tasks to ~0.5.0

[skip validator] [skip sauce]
Merge pull request #13820 from twbs/bump-load-tasks

bump load-grunt-tasks to ~0.5.0
README.md: Refactoring bages.
Merge pull request #13827 from vsn4ik/refactoring_by_vsn4ik

Refactoring bages in README.md.