update readme

update readme

Merge pull request #36 from Mundreanuc223/main

fix: optional chaining

fix: null delivery

fix: handle null deliveries

chore: update medusa to 2.0 stable

Merge pull request #43 from medusajs/update-rc

fix: currency codes capitalization

Merge pull request #42 from medusajs/update-rc

fix: queries

Merge pull request #41 from medusajs/update-rc

fix: build

chore: update to rc

chore: update tsconfig