Implement github actions (#105)

* Create gradle.yml

* Delete travis.yml

* Update Readme

Co-authored-by: Carolina Lopez <calopez@twilio.com>

Author: lopenchi

.github/workflows/gradle.yml

@@ -0,0 +1,37 @@
+# This workflow will build a Java project with Gradle
+# For more information see: https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-gradle
+
+name: Java Servlet CI
+
+on:
+  push:
+    branches: [ master ]
+    paths-ignore:
+      - '**.md'
+      - '**.json'
+  pull_request:
+    branches: [ master ]
+    paths-ignore:
+      - '**.md'
+      - '**.json'
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      max-parallel: 3
+      matrix:
+        os: [ubuntu-latest, macos-latest]
+        java: [ 8 ]
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Setup Java ${{ matrix.java }}
+        uses: actions/setup-java@v1
+        with:
+          java-version: ${{ matrix.java }}
+      - name: Build with Gradle
+        run: ./gradlew build
+      - name: Run tests
+        run: ./gradlew test

.travis.yml

@@ -4,7 +4,7 @@
 
 # TaskRouter on Servlets
 
-[![Build Status](https://travis-ci.org/TwilioDevEd/task-router-servlets.svg?branch=master)](https://travis-ci.org/TwilioDevEd/task-router-servlets)
+[![Java Servlet CI](https://github.com/TwilioDevEd/task-router-servlets/actions/workflows/gradle.yml/badge.svg)](https://github.com/TwilioDevEd/task-router-servlets/actions/workflows/gradle.yml)
 
 Use Twilio to provide your user with multiple options through phone calls, so
 they can be assisted by an agent specialized in the chosen topic. This is