@labkey/build package update to replace postcss.config.js file with inline webpack postcss-loader config (#39)

* Remove postcss.config.js file
* Update @labkey/build package version to 1.0.0

Author: cnathe

demo/package-lock.json

@@ -15,7 +15,7 @@
     "@labkey/components": "1.9.0"
   },
   "devDependencies": {
-    "@labkey/build": "0.5.0",
+    "@labkey/build": "1.0.0",
     "@types/enzyme": "3.10.7",
     "@types/jest": "26.0.14",
     "@types/react": "16.9.51",