Couchdb Nano Versions Save

• replace the deprecated request library with axios
• replace deprecated changes feed follower
• fewer dependencies

Maintenance release on v8.x.x including various Typescript fixes.

Released in preparation for v9.0.0 release based on axios instead of request.

• improved TypeScript definitions for Mango selectors

• TypeScript definitions improved and passed through --strict compiler to check for problems in downstream projects

• added new functions to deal with Partitioned Databases for CouchDB 3.
• rewritten test suite using jest with the focus less on testing CouchDB's functionality, but ensuring that Nano is dispatching the correct HTTP call. Most tests are "mocked" although some are performed against CouchDB 3 in a container.
• dependency bump
• fixed many TypeScript definitions which folks kindly raised as GitHub issues

• TypeScript definitions
• Typos in code and docs
• allow db.create to take an opts object, to specify q/r
• db.search does an HTTP POST instead of GET, which simplifies processing of parameters as they don't need to be URL encode, just passed as JSON
• dependency bump

• fix bug in handling of drilldown parameter in db.search
• various README fixes
• remove lodash dependency

• Promise support
• new ...AsStream functions
• improved TypeScript definitions
• tested against official CouchDB Docker image

Switch to cloudant-follow dependency.