Rename npm script build-docs to docs

Author: rohitkr

package.json

@@ -6,7 +6,7 @@
     "start": "ng serve",
     "start-prod": "ng serve --prod",
     "build": "rm -rf dist/ && node_modules/.bin/ngc -p tsconfig-aot.json && rollup -c rollup.config.js && cp package-dist.json dist/package.json && npm run uglify",
-    "build-docs": "ng build --prod && npm run build",
+    "docs": "ng build --prod && npm run build",
     "test": "ng test",
     "lint": "ng lint",
     "e2e": "ng e2e",