Fixes CI issues (#14)

* Don't update bundler in CI before install.

* Added GitHub workflow.

* Make the tests runs on macOS.

* Remove rubucop from dev dependencies in CI.

* Specify v1 as setup-ruby's version.

* Fixes typo.

* Remove rubucop from depdency.

* Get back to default bundler behaviour.

* Remove travis config.

* Add badge for GitHub Actions.

Author: linjunpop

.github/workflows/test.yml

@@ -0,0 +1,28 @@
+name: Tests
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+permissions:
+  contents: read
+
+jobs:
+  test:
+
+    runs-on: macos-latest
+    strategy:
+      matrix:
+        ruby-version: ['2.3', '2.4', '2.6', '2.7', '3.0']
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Set up Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: ${{ matrix.ruby-version }}
+        bundler-cache: true # runs 'bundle install' and caches installed gems automatically
+    - name: Run tests
+      run: bundle exec rake spec

.travis.yml

@@ -2,12 +2,10 @@
 
 Command line tool to send iMessage.
 
-[![Build Status](https://travis-ci.org/linjunpop/imessage.svg?branch=master)](https://travis-ci.org/linjunpop/imessage)
+![Tests](https://github.com/linjunpop/imessage/actions/workflows/test.yml/badge.svg)
 [![Gem Version](https://img.shields.io/gem/v/imessage.svg)](https://rubygems.org/gems/imessage)
 [![codebeat badge](https://codebeat.co/badges/69f6f8ee-8ddd-4355-aa7c-0cd4ac369718)](https://codebeat.co/projects/github-com-linjunpop-imessage-master)
 
-
-
 ## Installation
 
 ### As a Homebrew(http://brew.sh) package

README.md

@@ -20,5 +20,4 @@ Gem::Specification.new do |spec|
 
   spec.add_development_dependency 'rake', '~> 13.0'
   spec.add_development_dependency 'rspec', '~> 3.3'
-  spec.add_development_dependency 'rubocop', '~> 1.29'
 end