Replace Travis with GitHub Actions

Author: slisaasquatch

.github/workflows/JavaCI.yml

@@ -0,0 +1,15 @@
+name: JavaCI
+on: [push, pull_request]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-java@v2
+        with:
+          java-version: "8"
+          distribution: adopt
+      - name: Maven Package
+        run: mvn -B -U clean package -DskipTests
+      - name: Maven Verify
+        run: mvn -B -U verify

.travis.yml

@@ -1,7 +1,7 @@
 # json-schema-inferrer
 
 [![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)
-[![Build Status](https://travis-ci.org/saasquatch/json-schema-inferrer.svg?branch=master)](https://travis-ci.org/saasquatch/json-schema-inferrer)
+[![JavaCI](https://github.com/saasquatch/json-schema-inferrer/actions/workflows/JavaCI.yml/badge.svg?branch=master)](https://github.com/saasquatch/json-schema-inferrer/actions/workflows/JavaCI.yml)
 [![codecov](https://codecov.io/gh/saasquatch/json-schema-inferrer/branch/master/graph/badge.svg)](https://codecov.io/gh/saasquatch/json-schema-inferrer)
 [![](https://jitpack.io/v/saasquatch/json-schema-inferrer.svg)](https://jitpack.io/#saasquatch/json-schema-inferrer)