ci: migrate appveyor and travis to github actions

Author: ChristianMurphy

.github/workflows/CI.yml

@@ -0,0 +1,29 @@
+name: CI
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  test:
+    name: '${{ matrix.platform }} with Java 8'
+    strategy:
+      matrix:
+        platform:
+          - ubuntu-latest
+          - windows-latest
+          - macos-latest
+    runs-on: ${{ matrix.platform }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Set up JDK
+        uses: actions/setup-java@v2
+        with:
+          distribution: adopt-hotspot
+          java-version: 8
+      - name: Build and Test
+        run: mvn -B package

.travis.yml

@@ -1,8 +1,7 @@
 # Feedback Portlet
 
 [![Maven Central](https://maven-badges.herokuapp.com/maven-central/org.jasig.portlet/FeedbackPortlet/badge.svg)](https://maven-badges.herokuapp.com/maven-central/org.jasig.portlet/FeedbackPortlet)
-[![Linux Build Status](https://travis-ci.org/Jasig/FeedbackPortlet.svg?branch=master)](https://travis-ci.org/Jasig/FeedbackPortlet)
-[![Windows Build status](https://ci.appveyor.com/api/projects/status/1j35afgwdtvu0ets/branch/master?svg=true)](https://ci.appveyor.com/project/ChristianMurphy/feedbackportlet/branch/master)
+[![build status](https://github.com/uPortal-Project/FeedbackPortlet/workflows/CI/badge.svg?branch=master)](https://github.com/uPortal-Project/FeedbackPortlet/actions)
 
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