Migrate CI from Travis to GitHub Actions (main branch)

Author: Copilot

.github/workflows/unit-tests.yml

@@ -0,0 +1,41 @@
+name: Unit Tests
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+  schedule:
+    # Daily run that fans out across every active branch via the matrix
+    # job below. GitHub only fires `schedule:` from the workflow file on
+    # the default branch (main); copies of this file on
+    # non-default branches keep the block for symmetry but it is dormant
+    # there.
+    - cron: '0 8 * * *'
+  workflow_dispatch:
+
+jobs:
+  tests:
+    if: github.event_name != 'schedule'
+    uses: logstash-plugins/.ci/.github/workflows/unit-tests.yml@1.x
+    # Forward org/repo secrets (e.g. SLACK_BOT_TOKEN used by the reusable's
+    # failure-notification step). The reusable does not declare a
+    # workflow_call.secrets block, so `inherit` is required.
+    secrets: inherit
+    concurrency:
+      group: ${{ github.workflow }}-${{ github.ref }}
+      cancel-in-progress: ${{ github.ref != 'refs/heads/main' }}
+    with:
+      timeout-minutes: 60
+
+  scheduled:
+    if: github.event_name == 'schedule'
+    strategy:
+      fail-fast: false
+      matrix:
+        branch: [main]
+    uses: logstash-plugins/.ci/.github/workflows/unit-tests.yml@1.x
+    secrets: inherit
+    with:
+      ref: ${{ matrix.branch }}
+      timeout-minutes: 60

.travis.yml

@@ -1,6 +1,6 @@
 # Logstash Plugin
 
-[![Travis Build Status](https://travis-ci.com/logstash-plugins/logstash-codec-netflow.svg)](https://travis-ci.com/logstash-plugins/logstash-codec-netflow)
+[![Unit Tests](https://github.com/logstash-plugins/logstash-codec-netflow/actions/workflows/unit-tests.yml/badge.svg?branch=main)](https://github.com/logstash-plugins/logstash-codec-netflow/actions/workflows/unit-tests.yml)
 
 This is a plugin for [Logstash](https://github.com/elastic/logstash).