Use GitHub Actions instead TravisCI

- Remove travis and add github workflows ci
- Require 'active_support/notifications' to fix uninitialized constant ActiveSupport::Notifications

.github/workflows/ci.yml

@@ -0,0 +1,25 @@
+name: CI
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest]
+        ruby: ["2.6", "2.7", "3.0"]
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Set up Ruby, bundler and dependencies
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          bundler-cache: true
+
+      - name: Run tests
+        run: bundle exec rspec
+

README.md

@@ -1,6 +1,6 @@
 # Cassette::Client
 
-[![Build Status](https://travis-ci.org/locaweb/cassette.svg)](https://travis-ci.org/locaweb/cassette)
+[![Build Status](https://github.com/locaweb/cassette/actions/workflows/ci.yml/badge.svg)](https://github.com/locaweb/cassette/actions/workflows/ci.yml)
 
 [![Test Coverage](https://codeclimate.com/github/locaweb/cassette/badges/coverage.svg)](https://codeclimate.com/github/locaweb/cassette/coverage)
 

lib/cassette/authentication/cache.rb

@@ -2,6 +2,7 @@
 
 require 'cassette/authentication'
 require 'cassette/cache'
+require 'active_support/notifications'
 
 module Cassette
   class Authentication