updated build system

Author: Dipak Sarkar

package.json

@@ -42,6 +42,7 @@
     "jest": "^25.3.0",
     "node-fetch": "^2.6.0",
     "npm-run-all": "^4.1.5",
+    "postcss": "6.0",
     "quasar": "^1.11.3",
     "rollup": "^2.6.1",
     "rollup-plugin-buble": "^0.19.8",

yarn.lock

@@ -11030,6 +11030,15 @@ 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@6.0, postcss@^6.0.1:
+  version "6.0.23"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-6.0.23.tgz#61c82cc328ac60e677645f979054eb98bc0e3324"
+  integrity sha512-soOk1h6J3VMTZtVeVpv15/Hpdl2cBLX3CAw4TAbkpTJiNPk9YP/zWcD1ND+xEtvyuuvKzbxliTOIyvkSeSJ6ag==
+  dependencies:
+    chalk "^2.4.1"
+    source-map "^0.6.1"
+    supports-color "^5.4.0"
+
 postcss@^5.2.5:
   version "5.2.18"
   resolved "https://registry.yarnpkg.com/postcss/-/postcss-5.2.18.tgz#badfa1497d46244f6390f58b319830d9107853c5"
@@ -11040,15 +11049,6 @@ postcss@^5.2.5:
     source-map "^0.5.6"
     supports-color "^3.2.3"
 
-postcss@^6.0.1:
-  version "6.0.23"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-6.0.23.tgz#61c82cc328ac60e677645f979054eb98bc0e3324"
-  integrity sha512-soOk1h6J3VMTZtVeVpv15/Hpdl2cBLX3CAw4TAbkpTJiNPk9YP/zWcD1ND+xEtvyuuvKzbxliTOIyvkSeSJ6ag==
-  dependencies:
-    chalk "^2.4.1"
-    source-map "^0.6.1"
-    supports-color "^5.4.0"
-
 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"