0.1.0-beta.2

• refactor
  • add StatesBuilder child parameter #81
• test
  • simplify test description #80
• include changes made from dart_scope 0.1.0-beta.3 #79
  • feature
    • add configurables Computed{4~9} #192
    • add operators States.computed{4~9} #191
    • add operators Observable.combine{4~9} #190
  • refactor
    • replace States.combine with States.computed #188