Switch CI from Travis to GitHub Actions

.github/workflows/ci.yml

@@ -0,0 +1,42 @@
+name: CI
+
+on:
+  push:
+  pull_request:
+    branches:
+      # Branches from forks have the form 'user:branch-name' so we only run
+      # this job on pull_request events for branches that look like fork
+      # branches. Without this we would end up running this job twice for non
+      # forked PRs, once for the push and then once for opening the PR.
+      - "**:**"
+  schedule:
+    - cron: "0 3 * * 1" # Every monday at 3 AM
+
+jobs:
+  test:
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest]
+        crystal: [latest, nightly]
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - name: Install Crystal
+        uses: oprypin/install-crystal@v1
+        with:
+          crystal: ${{ matrix.crystal }}
+
+      - name: Download source
+        uses: actions/checkout@v2
+
+      - name: Install dependencies
+        run: shards install
+        env:
+          SHARDS_OPTS: --ignore-crystal-version
+
+      - name: Run specs
+        run: make test
+
+      - name: Check formatting
+        run: crystal tool format --check

.gitignore

@@ -7,5 +7,3 @@
 # Libraries don't need dependency lock
 # Dependencies will be locked in application that uses them
 /shard.lock
-
-*.html

.travis.yml

@@ -1,28 +0,0 @@
-language: crystal
-
-crystal:
-  - latest
-  - nightly
-
-jobs:
-  allow_failures:
-    - crystal: nightly
-
-install:
-  - shards install
-
-script:
-  - make test
-  - crystal tool format --check
-  - sed -i -e 's:<.*>::g' README.md
-  - crystal docs
-
-deploy:
-  provider: pages
-  github_token: $GITHUB_TOKEN
-  project_name: ameba
-  skip_cleanup: true
-  on:
-    branch: master
-  local_dir: docs
-  verbose: true

README.md

@@ -8,7 +8,7 @@
     </sup>
   </p>
   <p align="center">
-    <a href="https://travis-ci.org/crystal-ameba/ameba"><img src="https://travis-ci.org/crystal-ameba/ameba.svg?branch=master"></a>
+    <a href="https://github.com/crystal-ameba/ameba/actions?query=workflow%3ACI"><img src="https://github.com/crystal-ameba/ameba/workflows/CI/badge.svg"></a>
     <a href="https://github.com/crystal-ameba/ameba/releases"><img src="https://img.shields.io/github/release/crystal-ameba/ameba.svg?maxAge=360"></a>
     <a href="https://github.com/crystal-ameba/ameba/blob/master/LICENSE"><img src="https://img.shields.io/github/license/crystal-ameba/ameba.svg"></a>
   <a href="https://gitter.im/veelenga/ameba?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge"><img src="https://badges.gitter.im/veelenga/ameba.svg"></a>