v0.8.0

SymbolicUtils v0.8.0

Diff since v0.7.8

Closed issues:

• convert Expr to Term? (#150)
• Converting in and out of binary tree in SymbolicRegression.jl (#179)
• Multiple dispatch for symbolic arguments? /lazy evaluation (#186)

Merged pull requests:

• WIP: Code matching and Expr generation (#183) (@shashi)
• deprecate cond for IfElse.ifelse (#189) (@oxinabox)
• Remove use of to_symbolic (#190) (@shashi)
• Less crazy doc CI setup (#191) (@shashi)