fix: Correct typos and use ESM throughout

lib/sdk.js

@@ -30,7 +30,7 @@ const keyOptions = [
  *
  * @returns {Promise<CryptoKey>}
  */
-exports.generateKey = () => {
+export function generateKey() {
   return crypto.subtle.generateKey(...keyOptions)
 }
 
@@ -41,7 +41,7 @@ exports.generateKey = () => {
  *
  * @returns {Promise<CryptoKey>}
  */
-exports.importKey = (key) => {
+export function importKey(key) {
   return crypto.subtle.importKey('raw', key, ...keyOptions)
 }
 
@@ -52,14 +52,14 @@ exports.importKey = (key) => {
  *
  * @returns {Promise<ArrayBuffer>}
  */
-exports.exports.ey = (key) => {
-  return crypto.subtle.exports.ey('raw', key)
+export function exportKey = (key) => {
+  return crypto.subtle.exportKey('raw', key)
 }
 
 /**
  * Class holding the core functionality of the Pat SDK
  */
-exports.PatSDK = class PatSDK {
+export class PatSDK {
   /**
    * Create an instance of the Pat SDK.
    *
@@ -163,7 +163,7 @@ exports.PatSDK = class PatSDK {
  *
  * @abstract
  */
-exports.DataStore = class DataStore {
+export class DataStore {
   constructor() {
     if (new.target === DataStore) {
       throw new TypeError('DataStore is abstract and must be extended')

package.json

@@ -3,6 +3,7 @@
   "version": "0.0.0",
   "description": "Web SDK for the Pat Project",
   "main": "lib/sdk.js",
+  "type": "module",
   "directories": {
     "lib": "lib"
   },
@@ -19,5 +20,9 @@
   "bugs": {
     "url": "https://github.com/pat-project/web-sdk/issues"
   },
-  "homepage": "https://github.com/pat-project/web-sdk#readme"
+  "homepage": "https://github.com/pat-project/web-sdk#readme",
+  "devDependencies": {
+    "jest": "^25.4.0",
+    "jest-puppeteer": "^4.4.0"
+  }
 }