v2.0.0

Changes

• tree-shaking lodash with lodash-es.
• converted module to typescript.
• upgraded dependencies.
• added react hook generator.
• added setDefault() method that will override the passed-in default state.
• updated README.

Breaking

• renamed reset() method to revertToDefault().
• removed state property.
• internal lipid properties __defaultState, __obs, and __state are now
  private properties inaccessible outside the definition.