Release v3.9.0

Added

• Add the ability to download raw file, needed when size > 1MB (genintho) #1075
• Feat: Support new Team Repositories Endpoint (iBotPeaches) #1082
• App: add hook endpoints (glaubinix) #1086
• Add sync a fork branch with the upstream repository (DAGpro) #1084

Changed

• Fix return types in phpdoc for Assignees and ReviewRequest (rob006) #1078
• Fixed several typos and grammar errors (AndrewDawes) #1088