chore(tsconfig): fix compiling
chore(tsconfig): fix compiling

Compile using ES6. 'module' must be commonjs to include files imported
from node_modules.

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