https://github.com/segmentio/analytics-go/blob/30e6f7a7ae3d5a98f960c3f6464d968e73cc47eb/properties.go#L114 Shouldn't it be "json:"**sku**,omitempty""?
analytics-go/properties.go
Line 114 in 30e6f7a
Shouldn't it be "json:"sku,omitempty""?