Merge pull request #314 from semuxgo/master

Fix macOS Big Sur launch issue

Bump version

Update CHANGELOG

Docs: update change log and bump version

Tests: fix unit tests

Misc: bump version number

Trivial: add log

Core: update DEVNET spec

Misc: hide terminal for Semux GUI on Windows

Merge pull request #241 from semuxgo/gui-contract-panel

GUI: add smart contract panel