replace Travis CI with github actions

.github/workflows/check.yaml

@@ -0,0 +1,12 @@
+name: check
+on: [push]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@main
+      - uses: actions/setup-node@main
+        with:
+          node-version: 'lts/*'
+      - run: yarn install
+      - run: make check

Readme.md

@@ -1,6 +1,6 @@
 [![NPM version][npm-image]][npm-url]
-[![Build Status][travis-image]][travis-url]
-[![Dependency Status][gemnasium-image]][gemnasium-url]
+[![Build Status][build-image]][build-url]
+[![Dependency Status][deps-image]][deps-url]
 
 # vis-why
 
@@ -51,11 +51,11 @@ simplify(poly, 4, area);
 [npm]: https://www.npmjs.org/
 [vis-why]: https://hydra.hull.ac.uk/resources/hull:8338
 
-[npm-image]: https://img.shields.io/npm/v/vis-why.svg
+[npm-image]: https://img.shields.io/npm/v/vis-why
 [npm-url]: https://npmjs.org/package/vis-why
 
-[travis-url]: https://travis-ci.org/pirxpilot/vis-why
-[travis-image]: https://img.shields.io/travis/pirxpilot/vis-why.svg
+[build-url]: https://github.com/pirxpilot/vis-why/actions/workflows/check.yaml
+[build-image]: https://img.shields.io/github/actions/workflow/status/pirxpilot/vis-why/check.yaml?branch=main
 
-[gemnasium-image]: https://img.shields.io/gemnasium/pirxpilot/vis-why.svg
-[gemnasium-url]: https://gemnasium.com/pirxpilot/vis-why
+[deps-image]: https://img.shields.io/librariesio/release/npm/vis-why
+[deps-url]: https://libraries.io/npm/vis-why

package.json

@@ -6,10 +6,7 @@
   "scripts": {
     "test": "make check"
   },
-  "repository": {
-    "type": "git",
-    "url": "https://github.com/pirxpilot/vis-why.git"
-  },
+  "repository": "pirxpilot/vis-why",
   "keywords": [
     "line",
     "simplification"
@@ -30,4 +27,4 @@
   "files": [
     "index.js"
   ]
-}
+}