v0.4.0

DistributionsAD v0.4.0

Diff since v0.3.2

Merged pull requests:

• Add for.jl (#13) (@cscherrer)
• added length, params, and entropy for TuringDiagNormal (#14) (@torfjelde)
• Implement FillDist and ArrayDist (#19) (@mohamed82008)
• Install TagBot as a GitHub Action (#27) (@JuliaTagBot)
• Fixed bug in implementation of size (#28) (@torfjelde)
• Categorical and Dirichlet (#29) (@mohamed82008)
• Many more tests and test fixes (#32) (@mohamed82008)