assembly script quickstart error

~/code/as-boilerplater
➜ npm init
This utility will walk you through creating a package.json file.
It only covers the most common items, and tries to guess sensible defaults.

See `npm help json` for definitive documentation on these fields
and exactly what they do.

Use `npm install <pkg>` afterwards to install a package and
save it as a dependency in the package.json file.

Press ^C at any time to quit.
package name: (as-boilerplater)
version: (1.0.0)
description:
entry point: (index.js)
test command:
git repository:
keywords:
author:
license: (ISC)
About to write to /Users/zoe/code/as-boilerplater/package.json:

{
  "name": "as-boilerplater",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC"
}


Is this OK? (yes) yes

~/code/as-boilerplater is 📦 v1.0.0 via ⬢ v11.15.0 took 13s
➜ npm install --save @assemblyscript/loader
npm notice created a lockfile as package-lock.json. You should commit this file.
npm WARN as-boilerplater@1.0.0 No description
npm WARN as-boilerplater@1.0.0 No repository field.

+ @assemblyscript/loader@0.17.3
added 1 package from 1 contributor and audited 1 package in 1.293s
found 0 vulnerabilities


~/code/as-boilerplater is 📦 v1.0.0 via ⬢ v11.15.0 took 3s
➜ npm install --save-dev assemblyscript
npm WARN as-boilerplater@1.0.0 No description
npm WARN as-boilerplater@1.0.0 No repository field.

+ assemblyscript@0.17.3
added 3 packages from 29 contributors and audited 4 packages in 0.946s
found 0 vulnerabilities


~/code/as-boilerplater is 📦 v1.0.0 via ⬢ v11.15.0
➜ npx asinit .
Version: 0.17.3

This command will make sure that the following files exist in the project
directory '/Users/zoe/code/as-boilerplater':

  ./assembly
  Directory holding the AssemblyScript sources being compiled to WebAssembly.

  ./assembly/tsconfig.json
  TypeScript configuration inheriting recommended AssemblyScript settings.

  ./assembly/index.ts
  Example entry file being compiled to WebAssembly to get you started.

  ./build
  Build artifact directory where compiled WebAssembly files are stored.

  ./build/.gitignore
  Git configuration that excludes compiled binaries from source control.

  ./index.js
  Main file loading the WebAssembly module and exporting its exports.

  ./tests/index.js
  Example test to check that your module is indeed working.

  ./asconfig.json
  Configuration file defining both a 'debug' and a 'release' target.

  ./package.json
  Package info containing the necessary commands to compile to WebAssembly.

The command will try to update existing files to match the correct settings
for this instance of the compiler in '/Users/zoe/code/as-boilerplater/node_modules/assemblyscript'.

Do you want to proceed? [Y/n] Y

- Making sure that the project directory exists...
  Exists: /Users/zoe/code/as-boilerplater

- Making sure that the 'assembly' directory exists...
  Created: /Users/zoe/code/as-boilerplater/assembly

- Making sure that 'assembly/tsconfig.json' is set up...
  Created: /Users/zoe/code/as-boilerplater/assembly/tsconfig.json

- Making sure that 'assembly/index.ts' exists...
  Created: /Users/zoe/code/as-boilerplater/assembly/index.ts

- Making sure that the 'build' directory exists...
  Created: /Users/zoe/code/as-boilerplater/build

- Making sure that 'build/.gitignore' is set up...
  Created: /Users/zoe/code/as-boilerplater/build/.gitignore

- Making sure that 'package.json' contains the build commands...
  Updated: /Users/zoe/code/as-boilerplater/package.json

- Making sure that 'index.js' exists...
  Created: /Users/zoe/code/as-boilerplater/index.js

- Making sure that the 'tests' directory exists...
  Created: /Users/zoe/code/as-boilerplater/tests

- Making sure that 'tests/index.js' exists...
  Created: /Users/zoe/code/as-boilerplater/tests/index.js

- Making sure that 'asconfig.json' is set up...
  Created: /Users/zoe/code/as-boilerplater/asconfig.json

Done!

Don't forget to install dependencies before you start:

  npm install

To edit the entry file, open 'assembly/index.ts' in your editor of choice.
Create as many additional files as necessary and use them as imports.

To build the entry file to WebAssembly when you are ready, run:

  npm run asbuild

Running the command above creates the following binaries incl. their respective
text format representations and source maps:

  ./build/untouched.wasm
  ./build/untouched.wasm.map
  ./build/untouched.wat

  ^ The untouched WebAssembly module as generated by the compiler.
    This one matches your sources exactly, without any optimizations.

  ./build/optimized.wasm
  ./build/optimized.wasm.map
  ./build/optimized.wat

  ^ The optimized WebAssembly module using default optimization settings.
    You can change the optimization settings in 'package.json'.

To run the tests, do:

  npm test

The AssemblyScript documentation covers all the details:

  https://docs.assemblyscript.org

Have a nice day!

~/code/as-boilerplater is 📦 v1.0.0 via ⬢ v11.15.0 took 5s
➜ npm run asbuild

> as-boilerplater@1.0.0 asbuild /Users/zoe/code/as-boilerplater
> npm run asbuild:untouched && npm run asbuild:optimized


> as-boilerplater@1.0.0 asbuild:untouched /Users/zoe/code/as-boilerplater
> asc assembly/index.ts --target debug


> as-boilerplater@1.0.0 asbuild:optimized /Users/zoe/code/as-boilerplater
> asc assembly/index.ts --target release


~/code/as-boilerplater is 📦 v1.0.0 via ⬢ v11.15.0 took 8s
➜ npm test

> as-boilerplater@1.0.0 test /Users/zoe/code/as-boilerplater
> node tests

/Users/zoe/code/as-boilerplater/node_modules/@assemblyscript/loader/index.js:298
export async function instantiate(source, imports = {}) {
^^^^^^

SyntaxError: Unexpected token export
    at Module._compile (internal/modules/cjs/loader.js:760:23)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:827:10)
    at Module.load (internal/modules/cjs/loader.js:685:32)
    at Function.Module._load (internal/modules/cjs/loader.js:620:12)
    at Module.require (internal/modules/cjs/loader.js:723:19)
    at require (internal/modules/cjs/helpers.js:14:16)
    at Object.<anonymous> (/Users/zoe/code/as-boilerplater/index.js:2:16)
    at Module._compile (internal/modules/cjs/loader.js:816:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:827:10)
    at Module.load (internal/modules/cjs/loader.js:685:32)
npm ERR! Test failed.  See above for more details.

my package

{
  "name": "as-boilerplater",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "node tests",
    "asbuild:untouched": "asc assembly/index.ts --target debug",
    "asbuild:optimized": "asc assembly/index.ts --target release",
    "asbuild": "npm run asbuild:untouched && npm run asbuild:optimized"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "@assemblyscript/loader": "^0.17.3"
  },
  "devDependencies": {
    "assemblyscript": "^0.17.3"
  }
}