[IMP] owl: improve npm packaging

closes #611

package.json

@@ -2,10 +2,10 @@
   "name": "@odoo/owl",
   "version": "1.0.0-beta5",
   "description": "Odoo Web Library (OWL)",
-  "main": "dist/owl/index.js",
-  "types": "dist/owl/index.d.ts",
-  "prepublish": "npm run build",
-  "files": ["dist/owl/"],
+  "main": "dist/owl.js",
+  "types": "dist/types/index.d.ts",
+  "prepublish": "npm run buildcommonjs",
+  "files": ["dist/types/", "dist/owl.js"],
   "engines": {
     "node": ">=10.15.3"
   },

tsconfig.json

@@ -13,7 +13,8 @@
     "noImplicitReturns": true,
     "noFallthroughCasesInSwitch": true,
     "strictPropertyInitialization": true,
-    "strictNullChecks": true
+    "strictNullChecks": true,
+    "declarationDir": "dist/types"
   },
   "include": ["src/**/*.ts","src/*.ts"]
 }