feat: Typescript for API layer (#817)

Co-authored-by: Philip Korsholm <88927411+pKorsholm@users.noreply.github.com>
Co-authored-by: Zakaria El Asri <33696020+zakariaelas@users.noreply.github.com>
Co-authored-by: Kasper Fabricius Kristensen <45367945+kasperkristensen@users.noreply.github.com>
Co-authored-by: Philip Korsholm <philip.korsholm@hotmail.com>
Co-authored-by: Sebastian Rindom <seb@medusa-commerce.com>

package.json

@@ -19,7 +19,7 @@
     "babel-jest": "^26.6.3",
     "babel-preset-medusa-package": "^1.0.0",
     "cross-env": "^7.0.2",
-    "eslint": "^8.0.0",
+    "eslint": "^8.2.0",
     "eslint-config-google": "^0.14.0",
     "eslint-config-prettier": "^8.3.0",
     "eslint-plugin-prettier": "^4.0.0",