Fix typo and add prepack

Author: AaravMalani

README.md

@@ -11,7 +11,7 @@ yarn add @sourceacademy/autocomplete-plugin@github:source-academy/autocomplete-p
 Then, directly import them from your code
 
 ```ts
-import { BaseAutoCompleteWebPlugin } from '@source-academy/autocomplete-plugin';
+import { BaseAutoCompleteWebPlugin } from '@sourceacademy/autocomplete-plugin';
 
 export class AutoCompletePlugin extends BaseAutoCompleteWebPlugin {
     (...)

package.json

@@ -5,6 +5,7 @@
   "description": "The autocomplete plugin for Conductor framework",
   "scripts": {
     "build": "rollup -c --bundleConfigAsCjs",
+    "prepack": "yarn build",
     "watch": "rollup -cw --bundleConfigAsCjs",
     "lint": "eslint --concurrency=auto src",
     "format": "prettier --write \"**/*.{ts,tsx,json,js,mjs}\"",
@@ -27,7 +28,8 @@
   "exports": {
     ".": {
       "import": "./dist/index.mjs",
-      "require": "./dist/index.cjs"
+      "require": "./dist/index.cjs",
+      "types": "./dist/index.d.ts"
     }
   },
   "bugs": {