Update demo page to reflect new library

Author: che-wf

gh-pages/.babelrc

@@ -0,0 +1,3 @@
+{
+  "presets": ["@babel/preset-env", "@babel/preset-react"]
+}

gh-pages/bin/update-demo.sh

@@ -0,0 +1,23 @@
+#!/bin/zsh
+# Update demo to use latest local library build
+
+set -e
+
+LIB_DIR="$(cd "$(dirname "$0")/../.." && pwd)"
+LIB_NAME="che-react-number-easing"
+
+cd "$LIB_DIR"
+echo "Building library..."
+npm run build
+echo "Packing library..."
+TARBALL=$(npm pack | tail -n1)
+
+cd "$LIB_DIR/gh-pages"
+echo "Cleaning demo node_modules..."
+rm -rf node_modules package-lock.json
+echo "Installing new library tarball..."
+npm install "../$TARBALL"
+npm install
+echo "Building demo..."
+npm run build
+echo "Demo updated to latest library version!"