test: add workflow

Author: andreas-timm

.github/workflows/test.yml

@@ -0,0 +1,17 @@
+name: test
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: oven-sh/setup-bun@v1
+        with:
+            bun-version: 1.1.8
+      - run: bun install
+      - run: bun test

README.md

@@ -1,5 +1,7 @@
 # EIP-191 Code Signature (Typescript)
 
+[![test](https://github.com/andreas-timm/code-signature-ts/actions/workflows/test.yml/badge.svg)](https://github.com/andreas-timm/code-signature-ts/actions/workflows/test.yml)
+
 ## Motivation
 Ensuring the integrity and authenticity of text files, especially source code, makes sense. This module offers a tool to sign text files with an EVM account using EIP-191[^1] signatures, providing an alternative to GPG that is not tied to an email address.