Remove postcss line

Author: janniks

package.json

@@ -20,12 +20,11 @@
     "build": "cross-env NODE_ENV=production rollup --config build/rollup.config.js",
     "build:ssr": "cross-env NODE_ENV=production rollup --config build/rollup.config.js --format cjs",
     "build:es": "cross-env NODE_ENV=production rollup --config build/rollup.config.js --format es",
-    "build:postcss": "cross-env NODE_ENV=production rollup --config build/rollup.config.js --format postcss",
     "build:unpkg": "cross-env NODE_ENV=production rollup --config build/rollup.config.js --format iife",
     "release:minor": "npm version minor -m 'Release %s' && npm publish",
     "release:patch": "npm version patch -m 'Release %s' && npm publish",
     "postpublish": "./scripts/postpublish.sh",
-    "prepare": "rm -rf dist && npm run build"
+    "prepare": "rm -rf dist *.tgz && npm run build"
   },
   "dependencies": {
     "cross-fetch": "^3.0.6",