add github actions CI

.github/workflows/ci.yml

@@ -0,0 +1,25 @@
+name: Tests
+on:
+  schedule:
+  - cron: '0 10 1 * *'
+  pull_request:
+    branches:
+      - master
+  push:
+    branches:
+      - master
+jobs:
+  build:
+    name: Test
+    runs-on: ubuntu-latest
+
+    container:
+      image: crystallang/crystal:latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - run: crystal --version
+    - run: shards install
+    - run: crystal spec
+    - run: crystal run examples/test.cr
+    - run: crystal run examples/test2.cr

.travis.yml

@@ -1,8 +0,0 @@
-language: crystal
-crystal:
-  - latest
-  - nightly
-script:
-  - crystal spec
-  - crystal run examples/test.cr
-  - crystal run examples/test2.cr

LICENSE

@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2015 Aşkın Gedik
+Copyright (c) 2021 Aşkın Gedik
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal