Release v0.0.13

What's Changed

• fee estimator by @dmytropiatkivskyi in #36
• Fix/cycle when redeem amount less than fee by @dmytropiatkivskyi in #39
• Feat: now it's possible to subscribe on notifications by @bullet-tooth in #37
• Add testnet4 support by @bullet-tooth in #40
• Fix NPE for bicoind by @bullet-tooth in #42
• Fix CI build by @bullet-tooth in #41
• Chore: update from upstream by @bullet-tooth in #43
• fix bitcoin net by @bullet-tooth in #44
• feat: add rescan method by @bullet-tooth in #45
• Fix: wallet notifications listening by @bullet-tooth in #46

Full Changelog: v0.0.12...v0.0.13