Simplify npm build

Author: flekschas

package.json

@@ -39,8 +39,7 @@
     "dist/piling-dimensionality-reducer.esm.js"
   ],
   "scripts": {
-    "build": "npm run build-library; npm run build-webpage;",
-    "build-library": "rm -rf dist/*; rollup -c;",
+    "build": "rm -rf dist/*; rollup -c;",
     "build-webpage": "mkdir -p webpage-build; rm -rf webpage-build/*; cd webpage && npm run build && cd ..; webpack --config ./webpack.config.js --mode production; cp -r webpage/public/* webpage-build; touch webpage-build/demos/.nojekyll; ./copy-example-data.sh;",
     "deploy": "npm run build-webpage; gh-pages -d webpage-build -t --git git",
     "lint": "eslint src examples rollup.config.js webpack.config.js",