Index: frontend/node_modules/css-tree/package.json
===================================================================
--- frontend/node_modules/css-tree/package.json	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/css-tree/package.json	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,62 @@
+{
+  "name": "css-tree",
+  "version": "1.0.0-alpha.37",
+  "description": "CSSTree is a tool set to work with CSS, including fast detailed parser (string->AST), walker (AST traversal), generator (AST->string) and lexer (validation and matching) based on knowledge of spec and browser implementations",
+  "author": "Roman Dvornov <rdvornov@gmail.com> (https://github.com/lahmatiy)",
+  "license": "MIT",
+  "repository": "csstree/csstree",
+  "keywords": [
+    "css",
+    "ast",
+    "tokenizer",
+    "parser",
+    "walker",
+    "lexer",
+    "generator",
+    "utils",
+    "syntax",
+    "validation"
+  ],
+  "main": "./lib/index",
+  "browser": {
+    "./data": "./dist/default-syntax.json"
+  },
+  "scripts": {
+    "build": "npm run gen:syntax && rollup --config && terser dist/csstree.js --compress --mangle -o dist/csstree.min.js",
+    "lint": "eslint data lib scripts test && node scripts/review-syntax-patch --lint && node scripts/update-docs --lint",
+    "lint-and-test": "npm run lint && npm test",
+    "update:docs": "node scripts/update-docs",
+    "gen:syntax": "node scripts/gen-syntax-data",
+    "review:syntax-patch": "node scripts/review-syntax-patch",
+    "test": "mocha --reporter progress",
+    "coverage": "nyc npm test",
+    "travis": "nyc npm run lint-and-test && npm run coveralls",
+    "coveralls": "nyc report --reporter=text-lcov | coveralls",
+    "prepublishOnly": "npm run build",
+    "hydrogen": "node --trace-hydrogen --trace-phase=Z --trace-deopt --code-comments --hydrogen-track-positions --redirect-code-traces --redirect-code-traces-to=code.asm --trace_hydrogen_file=code.cfg --print-opt-code bin/parse --stat -o /dev/null"
+  },
+  "dependencies": {
+    "mdn-data": "2.0.4",
+    "source-map": "^0.6.1"
+  },
+  "devDependencies": {
+    "coveralls": "^3.0.4",
+    "eslint": "^6.3.0",
+    "json-to-ast": "^2.1.0",
+    "mocha": "^5.2.0",
+    "nyc": "^14.1.1",
+    "rollup": "^1.22.0",
+    "rollup-plugin-commonjs": "^10.1.0",
+    "rollup-plugin-json": "^4.0.0",
+    "rollup-plugin-node-resolve": "^5.2.0",
+    "terser": "^4.3.4"
+  },
+  "engines": {
+    "node": ">=8.0.0"
+  },
+  "files": [
+    "data",
+    "dist",
+    "lib"
+  ]
+}