v0.6.1

AbstractDifferentiation v0.6.1

Diff since v0.6.0

Merged pull requests:

• Run CI on tags (#118) (@gdalle)
• Fix docstring for value_and_pullback_function (#125) (@gdalle)
• Remove duplicate methods of value_and_hessian (#126) (@adrhill)

Closed issues:

• New version timeline (#116)
• Inconsistency in value_and_pushforward_function vs value_and_pullback_function outputs (#119)
• value_and_pullback_function doesn't do what its docstring says (#124)