* [typescript] add build support for typescript
* [typescript] working lint and build
* [typescript] refactor SupersetClient to TS
* [typescript][connection] leverage RequestInit types when relevant
* [typescript][connection] callApi.js => callApi.ts
* [typescript][connection] remaining .js => .ts
* [typescript][connection] add and export src/types.ts, refactor things, convert test to .ts and fix
* [typescript] build:ts only in typescript-containing packages
* [core] expose 'parseMethod' in SupersetClient and callApi for text responses
* [parseResponse][test] fix parseMethod test
* [monorepo] gitignore .npmrc
* [core][deps] @data-ui/build-config => ^0.0.14
* [monorepo] tweak npm scripts
* [core] clean up parseResponse
* [core] clean up parseResponse more
* [core] don't fallback to text parsing if response is supposed to be json, allow for null responseParser
* [core][tests] fix borken tests, return promises instead of calling done()