Add testing via GitHub Actions

.github/workflows/test.yaml

@@ -0,0 +1,19 @@
+name: Test
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-go@v3
+        with:
+          go-version: "^1.19.1"
+          cache: true
+      - run: go test ./...

README.md

@@ -2,6 +2,7 @@
 
 [![GitHub tag (latest
 SemVer)](https://img.shields.io/github/v/tag/dstotijn/go-notion?label=go%20module)](https://github.com/dstotijn/go-notion/tags)
+[![Test](https://github.com/dstotijn/go-notion/actions/workflows/test.yaml/badge.svg)](https://github.com/dstotijn/go-notion/actions/workflows/test.yml)
 [![Go
 Reference](https://pkg.go.dev/badge/github.com/dstotijn/go-notion.svg)](https://pkg.go.dev/github.com/dstotijn/go-notion)
 [![GitHub](https://img.shields.io/github/license/dstotijn/go-notion)](LICENSE)

go.mod

@@ -1,6 +1,6 @@
 module github.com/dstotijn/go-notion
 
-go 1.16
+go 1.19
 
 require (
 	github.com/google/go-cmp v0.5.5