Migrate from Travis-CI to Github Actions

Since Maven is not supported by Coveralls GH Action,
we also need to migrate coverage to Codecov.

.github/workflows/build.yml

@@ -0,0 +1,37 @@
+# This workflow will build a Java project with Maven
+# For more information see: https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-maven
+
+name: build
+
+on:
+  push:
+    branches: [ master, /\d\.0\.0-RC/ ]
+  pull_request:
+    branches: [ master, /\d\.0\.0-RC/ ]
+
+jobs:
+  build-test-coverage:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up JDK 11
+      uses: actions/setup-java@v2
+      with:
+        java-version: '11'
+        distribution: 'adopt'
+    - uses: actions/cache@v2
+      with:
+        path: ~/.m2
+        key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
+        restore-keys: ${{ runner.os }}-m2
+    - name: Run build steps and generate coverage report with Maven
+      run: |
+        mvn verify javadoc:javadoc jacoco:report -Pcoverage -B -V
+    - name: Upload coverage report to Codecov
+      uses: codecov/codecov-action@v1
+      with:
+        file: ./**/target/site/jacoco/jacoco.xml
+        name: codecov
+        fail_ci_if_error: true

README.md

@@ -1,4 +1,5 @@
-# GoodData HTTP Client [![Build Status](https://travis-ci.org/gooddata/gooddata-http-client.svg?branch=master)](https://travis-ci.org/gooddata/gooddata-http-client) [![Javadocs](http://javadoc.io/badge/com.gooddata/gooddata-http-client.svg)](http://javadoc.io/doc/com.gooddata/gooddata-http-client) [![Maven Central](https://maven-badges.herokuapp.com/maven-central/com.gooddata/gooddata-http-client/badge.svg)](https://maven-badges.herokuapp.com/maven-central/com.gooddata/gooddata-http-client)
+# GoodData HTTP Client
+[![Build Status](https://github.com/gooddata/gooddata-http-client/actions/workflows/build.yml/badge.svg?branch=master)](https://github.com/gooddata/gooddata-http-client/actions/workflows/build.yml) [![Javadocs](http://javadoc.io/badge/com.gooddata/gooddata-http-client.svg)](http://javadoc.io/doc/com.gooddata/gooddata-http-client) [![Maven Central](https://maven-badges.herokuapp.com/maven-central/com.gooddata/gooddata-http-client/badge.svg)](https://maven-badges.herokuapp.com/maven-central/com.gooddata/gooddata-http-client) [![Release](https://img.shields.io/github/v/release/gooddata/gooddata-http-client.svg)](https://search.maven.org/artifact/com.gooddata/gooddata-http-client)
 
 GoodData HTTP Client is an extension of [Apache HTTP Client](http://hc.apache.org/httpcomponents-client-4.3.x/index.html) (former Jakarta Commons).
 This specialized Java client transparently handles [GoodData authentication](https://help.gooddata.com/display/doc/API+Reference#/reference/authentication/log-in)

pom.xml

@@ -181,18 +181,6 @@
             <id>coverage</id>
             <build>
                 <plugins>
-                    <plugin>
-                        <groupId>org.eluder.coveralls</groupId>
-                        <artifactId>coveralls-maven-plugin</artifactId>
-                        <version>4.3.0</version>
-                        <dependencies>
-                            <dependency>
-                                <groupId>javax.xml.bind</groupId>
-                                <artifactId>jaxb-api</artifactId>
-                                <version>2.3.1</version>
-                            </dependency>
-                        </dependencies>
-                    </plugin>
                     <plugin>
                         <groupId>org.jacoco</groupId>
                         <artifactId>jacoco-maven-plugin</artifactId>