v0.5.1

JustPIC v0.5.1

Diff since v0.5.0

Merged pull requests:

• Custom GPU conversion for CellArrays (#145) (@albert-de-montserrat)
• Add type argurment to Array, CuArray, ROCArray conversions (#146) (@albert-de-montserrat)
• Fix test (#147) (@albert-de-montserrat)
• Improve test coverage (#148) (@albert-de-montserrat)
• Docs correction (#149) (@albert-de-montserrat)
• Bump minor version (#151) (@albert-de-montserrat)