Fixed incorrect merge 

Updated changelog 

Changelog 

Merge pull request yiisoft#5 from tof06/pjax-fix-redirect Let PJAX request follows HTTP Redirect in any case

patch v1.8.0-patch1 

pjax 1.8.0 

pjax 1.7.3 

pjax 1.7.2 

pjax 1.7.1