Replace travis with github workflows

Author: hellcp

.github/workflows/ci.yml

@@ -0,0 +1,21 @@
+name: Tests CI
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: configure
+      run: |
+        touch tests/include/pebble_warn_unsupported_functions.h
+    - name: make test
+      run: make test
+

.travis.yml

@@ -1,4 +1,4 @@
-# Linked List [![Build Status](http://img.shields.io/travis/smallstoneapps/linked-list.svg?style=flat-square)](https://travis-ci.org/smallstoneapps/linked-list/) [![npm (scoped)](https://img.shields.io/npm/v/@rebble/linked-list.svg?maxAge=2592000&style=flat-square)](https://www.npmjs.com/package/@rebble/linked-list) [![MIT License](http://img.shields.io/badge/license-MIT-lightgray.svg?style=flat-square)](./LICENSE)
+# Linked List [![Build Status](https://github.com/pebble-dev/linked-list/actions/workflows/ci.yml/badge.svg?branch=master)](https://github.com/pebble-dev/linked-list/actions/workflows/ci.yml) [![npm (scoped)](https://img.shields.io/npm/v/@rebble/linked-list.svg?maxAge=2592000&style=flat-square)](https://www.npmjs.com/package/@rebble/linked-list) [![MIT License](http://img.shields.io/badge/license-MIT-lightgray.svg?style=flat-square)](./LICENSE)
 
 A simple linked list implementation for Pebble apps and watchfaces.