Release 1.27.0+beta

[andreabadesso]

Changes

• https://github.com/HathorNetwork/hathor-wallet-service/pull/424
• https://github.com/HathorNetwork/hathor-wallet-service/pull/425
• https://github.com/HathorNetwork/hathor-wallet-service/pull/426
• https://github.com/HathorNetwork/hathor-wallet-service/pull/428
• https://github.com/HathorNetwork/hathor-wallet-service/pull/429

Release-candidates

• https://github.com/HathorNetwork/hathor-wallet-service/pull/435

Checklist

• [x] I've read and followed the release process described in https://github.com/HathorNetwork/ops-tools/blob/master/docs/release-guides/wallet-service.md#stable-release
• [x] The QA process was run successfully during the tests of the corresponding release-candidate(s)