v2.6.0

• docs(readme): make readme friendly to newcomers
• docs(issue): add Chinese issue template
• feat(subscribe): add unsubscribe api,add actions return value from Model
• refactor(middleware): add Global to context
• refactor(actions): extract similar comsumerActions in index.tsx
• style(global): .map => .entries/.foreach
• refactor(global): separate the state and actions
• docs(issue): beautify the issue template