Add CI & update README badges

.github/workflows/ci.yml

@@ -0,0 +1,20 @@
+name: CI
+on:
+  pull_request:
+  push:
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Setup JDK
+        uses: actions/setup-java@v3
+        with:
+          distribution: temurin
+          java-version: 21
+          cache: 'sbt''
+      - name: Build and Test
+        run: sbt +clean scalafmt::test test:scalafmt::test sbt:scalafmt::test coverage +compile +test:compile +test coverageReport && sbt coverageAggregate
+      - name: Upload code coverage
+        run: bash <(curl -s https://codecov.io/bash)

README.md

@@ -1,8 +1,8 @@
 # http://jsonapi.org/ implementation in scala
 
-[![Build Status](https://travis-ci.org/qvantel/jsonapi-scala.svg?branch=master)](https://travis-ci.org/qvantel/jsonapi-scala)
+![CI](https://github.com/qvantel/jsonapi-scala/actions/workflows/ci.yml/badge.svg)
 [![codecov](https://codecov.io/gh/qvantel/jsonapi-scala/branch/master/graph/badge.svg)](https://codecov.io/gh/qvantel/jsonapi-scala)
-[![Maven Central](https://maven-badges.herokuapp.com/maven-central/com.qvantel/jsonapi-scala-core_2.11/badge.svg)](https://maven-badges.herokuapp.com/maven-central/com.qvantel/jsonapi-scala-core_2.11)
+[![Maven Central (2.12 and 2.13)](https://maven-badges.herokuapp.com/maven-central/com.qvantel/jsonapi-scala-core_2.13/badge.svg)](https://maven-badges.herokuapp.com/maven-central/com.qvantel/jsonapi-scala-core_2.13)
 
 ## Features
 * Automatic generation of jsonapi json writers with relationship handling for case classes
@@ -108,4 +108,4 @@ implicit val endpoint: ApiEndpoint = ApiEndpoint.Static("http://localhost:8080/a
 implicit val client: Client[IO] = Http1Client[IO]().unsafeRunSync()
 
 val jac = JsonApiClient.instance
-```
+```