Adds Middleware API (#40)

* Adds test project

* Adds e2e for end-2-end tests

* Update gitignore

* Update loaders

* Creates test project

* v0.1.27

* Upgrade

* dependency fixes

* Load project plugins in the plugin loader

* Issue with instanceof

* Fixes versioning issues

* Adds medusa middleware api

* Adds documentation

* Fixes tests

packages/medusa-core-utils/package.json

@@ -19,11 +19,14 @@
     "@babel/cli": "^7.7.5",
     "@babel/core": "^7.7.5",
     "@babel/plugin-proposal-class-properties": "^7.7.4",
+    "@babel/plugin-transform-classes": "^7.9.5",
     "@babel/plugin-transform-runtime": "^7.7.6",
     "@babel/preset-env": "^7.7.5",
+    "@babel/runtime": "^7.9.6",
     "cross-env": "^5.2.1",
+    "eslint": "^6.8.0",
     "jest": "^25.5.2",
-    "eslint": "^6.8.0"
+    "prettier": "^1.19.1"
   },
   "dependencies": {
     "@hapi/joi": "^16.1.8",