Added features:

• (#85) The comparison logic now has cycle detection and can now handle graphs.
• (#176) The cmp.Exporter option provides finer-grained control over exactly what types to permit unexported field access on.
• (#158) cmpopts.EquateApproxTime provides the ability to compare timestamps with looser precision.
• (#178) cmpopts.EquateErrors provides the ability to compare error values using the new errors.Is semantics from Go 1.13.

Bug fixes:

• (#169) Use of unsafe.Pointer has been fixed to comply with stricter pointer rules for Go 1.14.