v0.12.1

TensorKit v0.12.1

Diff since v0.12.0

• Improved planar support
• Improved and extended AD rules
• Various small improvements

Merged pull requests:

• rewrite constructbraidingtensor preprocessor (#95) (@Jutho)
• Small fixes (#98) (@lkdvos)

Closed issues:

• Automatic Differentiation support (#63)
• Missing rrules for -(::AbstractTensorMap) and ⊗ (#88)
• difference of @planar and @tensor for fermionic tensors? (#91)
• contractcheck does not work together with braiding symbols (#92)