v0.8.4

SymbolicUtils v0.8.4

Diff since v0.8.3

Closed issues:

• "convert back" interface. (#79)
• Totally order terms (#85)
• Register (#146)

Merged pull requests:

• Point to Symbolics.jl (#210) (@ChrisRackauckas)
• Improve simplify docstring formatting (#211) (@ChrisRackauckas)
• Add skips in number_methods (#214) (@YingboMa)