fix: revert emmet bump, test svelte-check in CI

See microsoft/vscode-emmet-helper#79 for why we need to do this

Author: dummdidumm

packages/language-server/package.json

@@ -47,7 +47,7 @@
     },
     "dependencies": {
         "@jridgewell/trace-mapping": "^0.3.17",
-        "@vscode/emmet-helper": "2.9.2",
+        "@vscode/emmet-helper": "2.8.4",
         "chokidar": "^3.4.1",
         "estree-walker": "^2.0.1",
         "fast-glob": "^3.2.7",

packages/svelte-check/package.json

@@ -38,7 +38,7 @@
     "scripts": {
         "build": "rollup -c && node ./dist/src/index.js --workspace ./test --tsconfig ./tsconfig.json",
         "prepublishOnly": "npm run build",
-        "test": "echo 'NOOP'"
+        "test": "npm run build"
     },
     "devDependencies": {
         "@rollup/plugin-commonjs": "^24.0.0",