v2.0.0

What's Changed

• send auth and proof notifications by @ilya-korotya in #57
• fix type by @ilya-korotya in #58
• generate threadID for contract invoke message by @ilya-korotya in #59
• Upgrade github.com/iden3/go-iden3-core to v2 and bump self version to v2 by @olomix in #42
• fix tests by @ilya-korotya in #61
• add time delay by @ilya-korotya in #62
• fix wrong type definition for positiveInteger by @vmidyllic in #64

Full Changelog: v1.2.3...v2.0.0