ci: build xclip while pretesting

.prettierignore

@@ -4,4 +4,5 @@ node_modules
 .vscode
 .vscode-test
 /tests/test-data/
-/coverage/
+/coverage/
+/xclip/

package.json

@@ -42,10 +42,11 @@
   "scripts": {
     "publish": "npx vsce publish",
     "vscode:prepublish": "npm run compile",
+    "build:xclip": "cd xclip && npm run build",
     "prettier": "npx prettier -w .",
     "compile": "npm run lint && tsc -p ./",
     "watch": "tsc -watch -p ./",
-    "pretest": "rimraf ./out_test && npm run prettier && npm run lint && tsc --project ./ts-test.json && cpx \"./res/**/*\" \"./out_test/res\" --clean",
+    "pretest": "npm run build:xclip && rimraf ./out_test && npm run prettier && npm run lint && tsc --project ./ts-test.json && cpx \"./res/**/*\" \"./out_test/res\" --clean",
     "lint": "eslint src --ext ts",
     "test": "node ./out_test/test/runTest.js",
     "dev:preinstall": "npx vsce package",