Enable automated testing (#9)

Author: decibel

.github/workflows/ci.yml

@@ -0,0 +1,17 @@
+name: CI
+on: [push, pull_request]
+jobs:
+  test:
+    strategy:
+      matrix:
+        pg: [17, 16, 15, 14, 13, 12, 11, 10]
+    name: 🐘 PostgreSQL ${{ matrix.pg }}
+    runs-on: ubuntu-latest
+    container: pgxn/pgxn-tools
+    steps:
+      - name: Start PostgreSQL ${{ matrix.pg }}
+        run: pg-start ${{ matrix.pg }}
+      - name: Check out the repo
+        uses: actions/checkout@v4
+      - name: Test on PostgreSQL ${{ matrix.pg }}
+        run: pg-build-test

.travis.yml

@@ -5,11 +5,8 @@ A system for managing unit test data in Postgres.
 
 Documentation for the most recent version is on [PGXN](http://pgxn.org/dist/test_factory/doc/test_factory.html).
 
-Current Status
-==============
-You can see the current status of *released* versions of this extension on [PGXN-tester](http://pgxn-tester.org/distributions/test_factory).
-
-Travis-CI status: [![Build Status](https://travis-ci.org/BlueTreble/test_factory.png)](https://travis-ci.org/BlueTreble/test_factory)
+[![PGXN version](https://badge.fury.io/pg/test_factory.svg)](https://badge.fury.io/pg/test_factory)
+[![🐘 Postgres](https://github.com/decibel/test_factory/actions/workflows/ci.yml/badge.svg)](https://github.com/decibel/test_factory/actions/workflows/ci.yml)
 
 Easy Installation
 =================