* start moving it out, extract common exchange helpers to commons folder, ...

* correct graphcache imports related to common ast and help

* cleanup and lint

* move shared to a package in /exchanges

* add version to pkg.json

* run linter

* add jest preset to shared

* correct the jest regex

* try adding it to tsconfig

* add build to shared

* make the build work by adding it to the tsconfig rootDirs

* remove gitignore and add readme

* fix import and set version to 0.1.0 for populate