refactor(): import TS definitions rather than define them.
refactor(): import TS definitions rather than define them.

Imports the interfaces/types required to write an adapter rather than
define them locally.

cyclejs/cyclejs,maskinoshita/cyclejs,feliciousx-open-source/cyclejs,cyclejs/cycle-core,ntilwalli/cyclejs,maskinoshita/cyclejs,staltz/cycle,usm4n/cyclejs,maskinoshita/cyclejs,usm4n/cyclejs,ntilwalli/cyclejs,ntilwalli/cyclejs,usm4n/cyclejs,cyclejs/cyclejs,ntilwalli/cyclejs,cyclejs/cycle-core,cyclejs/cyclejs,feliciousx-open-source/cyclejs,cyclejs/cyclejs,usm4n/cyclejs,staltz/cycle,maskinoshita/cyclejs,feliciousx-open-source/cyclejs,feliciousx-open-source/cyclejs