Migrate tests from TravisCI to GitHub Actions

.github/workflows/tests.yml

@@ -0,0 +1,27 @@
+name: Run tests
+on:
+  - push
+jobs:
+  run-tests:
+    strategy:
+      fail-fast: false
+      matrix:
+        version:
+          - 3.2.2
+          - 3.1.4
+          - 3.0.6
+          - 2.7.8
+    runs-on: ubuntu-latest
+    env:
+      CI: true
+      BUNDLE_GEMFILE: ${{ github.workspace }}/graphql-latest.gemfile
+    steps:
+      - name: Checkout a commit
+        uses: actions/checkout@v4
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.version }}
+          bundler-cache: true
+      - name: Run tests
+        run: bundle exec rspec

README.md

@@ -1,6 +1,5 @@
 # BatchLoader
 
-[![Build Status](https://travis-ci.org/exAspArk/batch-loader.svg?branch=master)](https://travis-ci.org/exAspArk/batch-loader)
 [![Coverage Status](https://coveralls.io/repos/github/exAspArk/batch-loader/badge.svg)](https://coveralls.io/github/exAspArk/batch-loader)
 [![Code Climate](https://img.shields.io/codeclimate/maintainability/exAspArk/batch-loader.svg)](https://codeclimate.com/github/exAspArk/batch-loader/maintainability)
 [![Downloads](https://img.shields.io/gem/dt/batch-loader.svg)](https://rubygems.org/gems/batch-loader)

graphql-latest.gemfile

@@ -2,6 +2,6 @@ source "https://rubygems.org"
 
 gem 'coveralls'
 
-gem "graphql", ">= 1.8"
+gem "graphql", "~> 1.8"
 
 gemspec