v5.0.0

BREAKING: multiple file upload is now available via array of fixtures – chaining calls are not supported anymore (#251)
Massive documentation upgrade: #228 #229 #235 #246 #253 #254 #256 #257
Dependencies upgrade: #255
Switch to Github actions: #248

Shout out to @adrienjoly @zephraph @jethas-bennettjones @andrico1234 @paulblyth 🥂 🔥