chore: don't use force resolution for postcss

A root-level postcss 8 dependency should suffice to fix the hoisting issue

Author: haoqunjiang

package.json

@@ -64,6 +64,7 @@
     "memfs": "^3.2.0",
     "minimist": "^1.2.5",
     "node-fetch": "^2.6.1",
+    "postcss": "8.3.6",
     "prettier": ">= 1.13.0",
     "rimraf": "^3.0.2",
     "semver": "^7.3.4",
@@ -75,7 +76,6 @@
     "yorkie": "^2.0.0"
   },
   "resolutions": {
-    "postcss": "8.3.6",
     "puppeteer": "1.11.0",
     "vue-template-compiler": "^2.6.14",
     "vue-server-renderer": "^2.6.14"

yarn.lock

@@ -18863,7 +18863,7 @@ postcss-value-parser@^4.0.2, postcss-value-parser@^4.1.0:
   resolved "https://registry.yarnpkg.com/postcss-value-parser/-/postcss-value-parser-4.1.0.tgz#443f6a20ced6481a2bda4fa8532a6e55d789a2cb"
   integrity sha512-97DXOFbQJhk71ne5/Mt6cOu6yxsSfM0QGQyl0L25Gca4yGWEGJaig7l7gbCX623VqTBNGLRLaVUCnNkcedlRSQ==
 
-postcss@8.3.6, postcss@^7.0.0, postcss@^7.0.1, postcss@^7.0.14, postcss@^7.0.26, postcss@^7.0.27, postcss@^7.0.32, postcss@^7.0.36, postcss@^7.0.5, postcss@^7.0.6, postcss@^8.2.15, postcss@^8.2.6, postcss@^8.3.5:
+postcss@8.3.6, postcss@^8.2.15, postcss@^8.2.6, postcss@^8.3.5:
   version "8.3.6"
   resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.3.6.tgz#2730dd76a97969f37f53b9a6096197be311cc4ea"
   integrity sha512-wG1cc/JhRgdqB6WHEuyLTedf3KIRuD0hG6ldkFEZNCjRxiC+3i6kkWUUbiJQayP28iwG35cEmAbe98585BYV0A==
@@ -18872,6 +18872,15 @@ postcss@8.3.6, postcss@^7.0.0, postcss@^7.0.1, postcss@^7.0.14, postcss@^7.0.26,
     nanoid "^3.1.23"
     source-map-js "^0.6.2"
 
+postcss@^7.0.0, postcss@^7.0.1, postcss@^7.0.14, postcss@^7.0.26, postcss@^7.0.27, postcss@^7.0.32, postcss@^7.0.36, postcss@^7.0.5, postcss@^7.0.6:
+  version "7.0.36"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-7.0.36.tgz#056f8cffa939662a8f5905950c07d5285644dfcb"
+  integrity sha512-BebJSIUMwJHRH0HAQoxN4u1CN86glsrwsW0q7T+/m44eXOUAxSNdHRkNZPYz5vVUbg17hFgOQDE7fZk7li3pZw==
+  dependencies:
+    chalk "^2.4.2"
+    source-map "^0.6.1"
+    supports-color "^6.1.0"
+
 prelude-ls@^1.2.1:
   version "1.2.1"
   resolved "https://registry.yarnpkg.com/prelude-ls/-/prelude-ls-1.2.1.tgz#debc6489d7a6e6b0e7611888cec880337d316396"