Move dev dependencies to "devDependencies"

Spammy vulnerability scanning software can't tell we aren't using these in the "bun" npm package.

package.json

@@ -4,7 +4,7 @@
   "workspaces": [
     "./packages/bun-types"
   ],
-  "dependencies": {
+  "devDependencies": {
     "@vscode/debugadapter": "^1.65.0",
     "esbuild": "^0.21.4",
     "eslint": "^9.4.0",
@@ -15,9 +15,7 @@
     "react": "^18.3.1",
     "react-dom": "^18.3.1",
     "source-map-js": "^1.2.0",
-    "typescript": "^5.4.5"
-  },
-  "devDependencies": {
+    "typescript": "^5.4.5",
     "@types/bun": "^1.1.3",
     "@types/react": "^18.3.3",
     "@typescript-eslint/eslint-plugin": "^7.11.0",