Modernize, switch to ESM & GitHub Actions

.github/workflows/node.yml

@@ -0,0 +1,19 @@
+name: Node
+on: [push, pull_request]
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v4
+
+    - name: Setup Node
+      uses: actions/setup-node@v4
+      with:
+        node-version: 20
+
+    - name: Install dependencies
+      run: npm ci
+
+    - name: Run tests
+      run: npm test

README.md

@@ -1,6 +1,6 @@
 # MARTINI
 
-[![Build Status](https://travis-ci.com/mapbox/martini.svg?branch=main)](https://travis-ci.com/mapbox/martini) [![Simply Awesome](https://img.shields.io/badge/simply-awesome-brightgreen.svg)](https://github.com/mourner/projects)
+[![Simply Awesome](https://img.shields.io/badge/simply-awesome-brightgreen.svg)](https://github.com/mourner/projects)
 
 MARTINI stands for **Mapbox's Awesome Right-Triangulated Irregular Networks, Improved**.
 
@@ -15,6 +15,8 @@ Based on the paper ["Right-Triangulated Irregular Networks" by Will Evans et. al
 ## Example
 
 ```js
+import Martini from '@mapbox/martini';
+
 // set up mesh generator for a certain 2^k+1 grid size
 const martini = new Martini(257);
 

eslint.config.js

@@ -0,0 +1,10 @@
+import config from "eslint-config-mourner";
+
+export default [
+    ...config,
+    {
+        rules: {
+            'no-use-before-define': 0
+        }
+    }
+];