v11.0.0

GPUArrays v11.0.0

Diff since v10.3.1

Merged pull requests:

• Fix an ambiguity in copyto!. (#555) (@maleadt)
• Switch to KernelAbstractions.jl (#559) (@maleadt)
• Make the test suite use multiple processes. (#560) (@maleadt)
• Add OpenCL.jl to CI. (#563) (@maleadt)
• mapreduce: don't use broadcast when only dealing with a single arg. (#564) (@maleadt)

Closed issues:

• copyto! ambiguous (#554)
• Register a new version of JLArrays.jl (#562)