Add GitHub action that builds the extension

.github/workflows/build.yml

@@ -0,0 +1,20 @@
+name: Build
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - uses: oven-sh/setup-bun@v1
+      with:
+        bun-version: latest
+    - run: bun install
+    - run: bun run compile

package.json

@@ -22,7 +22,6 @@
   "scripts": {
     "compile": "tsc -p ./",
     "watch": "tsc -watch -p ./",
-    "postinstall": "bun ./node_modules/vscode/bin/install",
     "test": "bun run compile && bun ./node_modules/vscode/bin/test",
     "lint": "tslint --force -p .",
     "prepublish": "bun run compile",