v0.5.4

AMDGPU v0.5.4

Diff since v0.5.3

Closed issues:

• accumulate function missing? (#317)

Merged pull requests:

• Fix tests (#466) (@pxl-th)
• Remove HSA refcounter (#467) (@pxl-th)
• Move module declarations to their own files (#468) (@pxl-th)
• Fix ROCm discovery (#469) (@pxl-th)
• Implement accumulate kernel (#470) (@pxl-th)