Replace some dependencies with standard js APIs

[bwindels]

• replace qs module with using the global URLSearchParams class
• replace url module with using the global URL class (needs node 10.x)
• replace bluebird module with global Promise class. Non-standard bluebird features we use that need porting:
  • Promise.delay
  • Promise.defer
  • Promise.map
  • Promise.mapSeries
  • Promise::delay
  • Promise::timeout
  • Promise::value
  • Promise::isFulfilled
  • Promise::inspect
• replace cheerio module with global DOMParser class.