ci: migrate to GitHub Actions

Due to the recent changes to the Travis CI platform (see [1]), we will
now use GitHub Actions to run the tests.

Note: the certificate was updated because it failed with newer Node.js versions

```
_tls_common.js:129
      c.context.setCert(cert);
                ^

Error: error:140AB18F:SSL routines:SSL_CTX_use_certificate:ee key too small
    at Object.createSecureContext (_tls_common.js:129:17)
    at Server.setSecureContext (_tls_wrap.js:1328:27)
```

Reference: https://docs.github.com/en/free-pro-team@latest/actions/guides/building-and-testing-java-with-maven

[1]: https://blog.travis-ci.com/2020-11-02-travis-ci-new-billing

.github/workflows/ci.yml

@@ -0,0 +1,34 @@
+name: CI
+
+on:
+  push:
+  pull_request:
+  schedule:
+    - cron: '0 0 * * 0'
+
+jobs:
+  verify:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        java: [7, 8, 11]
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup java
+        uses: actions/setup-java@v1
+        with:
+          java-version: ${{ matrix.java }}
+      - name: Cache Maven packages
+        uses: actions/cache@v2
+        with:
+          path: ~/.m2
+          key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
+          restore-keys: ${{ runner.os }}-m2
+      - name: Setup Node.js
+        uses: actions/setup-node@v1
+        with:
+          node-version: 14.x
+      - name: Run the Maven verify phase
+        run: mvn verify -Dgpg.skip=true

.travis.yml

@@ -1,7 +0,0 @@
-language: java
-dist: trusty
-sudo: false
-install: mvn install -DskipTests=true -Dgpg.skip=true
-jdk:
-  - openjdk7
-  - oraclejdk8

README.md

@@ -1,5 +1,6 @@
 # Socket.IO-client Java
-[![Build Status](https://travis-ci.org/socketio/socket.io-client-java.png?branch=master)](https://travis-ci.org/socketio/socket.io-client-java)
+
+[![Build Status](https://github.com/socketio/socket.io-client-java/workflows/CI/badge.svg)](https://github.com/socketio/socket.io-client-java/actions)
 
 This is the Socket.IO v1.x and v2.x Client Library for Java, which is simply ported from the [JavaScript client](https://github.com/socketio/socket.io-client).
 

src/test/java/io/socket/client/SSLConnectionTest.java

@@ -66,7 +66,7 @@ public class SSLConnectionTest extends Connection {
         TrustManagerFactory tmf = TrustManagerFactory.getInstance("SunX509");
         tmf.init(ks);
 
-        SSLContext sslContext = SSLContext.getInstance("TLSv1");
+        SSLContext sslContext = SSLContext.getInstance("TLS");
         sslContext.init(kmf.getKeyManagers(), tmf.getTrustManagers(), null);
 
         sOkHttpClient = new OkHttpClient.Builder()

src/test/resources/cert.pem

@@ -1,10 +1,21 @@
 -----BEGIN CERTIFICATE-----
-MIIBfDCCASYCCQDTnGd/oOyF1DANBgkqhkiG9w0BAQUFADBFMQswCQYDVQQGEwJB
+MIIDazCCAlOgAwIBAgIUPRxvTroGehqqXb8XOvqliIcKyagwDQYJKoZIhvcNAQEL
-VTETMBEGA1UECBMKU29tZS1TdGF0ZTEhMB8GA1UEChMYSW50ZXJuZXQgV2lkZ2l0
+BQAwRTELMAkGA1UEBhMCQVUxEzARBgNVBAgMClNvbWUtU3RhdGUxITAfBgNVBAoM
-cyBQdHkgTHRkMB4XDTE0MDcwNzEzMTUzN1oXDTQxMTEyMTEzMTUzN1owRTELMAkG
+GEludGVybmV0IFdpZGdpdHMgUHR5IEx0ZDAeFw0yMDEyMTAxMDE0MDFaFw0zMDEy
-A1UEBhMCQVUxEzARBgNVBAgTClNvbWUtU3RhdGUxITAfBgNVBAoTGEludGVybmV0
+MDgxMDE0MDFaMEUxCzAJBgNVBAYTAkFVMRMwEQYDVQQIDApTb21lLVN0YXRlMSEw
-IFdpZGdpdHMgUHR5IEx0ZDBcMA0GCSqGSIb3DQEBAQUAA0sAMEgCQQC6sdeFPlqk
+HwYDVQQKDBhJbnRlcm5ldCBXaWRnaXRzIFB0eSBMdGQwggEiMA0GCSqGSIb3DQEB
-5Pap9woFx1RO05gLidw4MNcL+ZRSxy/sNeE4PhT/RLFcEvnXiHc92wT8YB5Z+WCM
+AQUAA4IBDwAwggEKAoIBAQCxJ8fUV6sRiNub3Af6jGpGTsWpCqtxBkRSADENMzdT
-k/jRQ0q19PNPAgMBAAEwDQYJKoZIhvcNAQEFBQADQQCnmm1N/yZiMBZw2JDfbsx3
+Twz4wUXXbgv/Tbt3XJovR1RtE9nx+WyA4XqBdfr8s/qDLiVWiyszU9E6jBjQva9B
-ecc0BGQ2BwWQuGHzP07TMi1AuOyNZSczl907OphYb9iRC8shZ4O+oXjQAuGTQ1Hp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 -----END CERTIFICATE-----

src/test/resources/key.pem

@@ -1,9 +1,28 @@
------BEGIN RSA PRIVATE KEY-----
+-----BEGIN PRIVATE KEY-----
-MIIBOwIBAAJBALqx14U+WqTk9qn3CgXHVE7TmAuJ3Dgw1wv5lFLHL+w14Tg+FP9E
+MIIEvAIBADANBgkqhkiG9w0BAQEFAASCBKYwggSiAgEAAoIBAQCxJ8fUV6sRiNub
-sVwS+deIdz3bBPxgHln5YIyT+NFDSrX0808CAwEAAQJAIdwLSIEsk2drTRwe1zl1
+3Af6jGpGTsWpCqtxBkRSADENMzdTTwz4wUXXbgv/Tbt3XJovR1RtE9nx+WyA4XqB
-ku5RTxZruE0zU1qqifDSQjab1StAK1tapxBVRlRlyLCfD704UClsU8sjGtq0Nh6n
+dfr8s/qDLiVWiyszU9E6jBjQva9BaGJDZU0BEXjGDTFaE4tL3E/YWZvXVKmrEiq0
-kQIhAO2YJM1g0w9bWYet3zC2UdEASPzaQ7llpZmc51NRBx2NAiEAyShICAaclEuy
+aZa6anbjOefjG46CnXgfir/TZlx+8I5s/UmKY5PZ525zLHx/hGbCNCOfdH196CUs
-wwuD4hibV+b6I8CLYoyPBo32EaceN0sCIQCUed6NxfM/houlgV+Xtmfcnzv9X3yx
+V5NNME5OIYIs0+9jLXkn8KS9uEKaifhf4rv4G2wo82KkIR1JIkKalH0xb0Z/R6+J
-EDdzjpz08Q7sRQIgZFv1fBOYYSBXQppnJRFzx2pUmCvDHtrTrMh84RfIqnsCIQCf
+2I2ADvxCIVxcGu78Nj0Ms5jpQKM6GTogpC3hN4fSAVdOLTHmQU1UrOg9btZtB79f
-JjNXXxOaHn1PNZpi6EHReiFQmy1Swt+AxpTsKixsfA==
+YWn1KmMlAgMBAAECggEAZCjGnTJ3wLEs4KD1Td2nlFqi/GDQ71UIuYfsM7daN1rB
------END RSA PRIVATE KEY-----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+-----END PRIVATE KEY-----