add a cypress scenario

package.json

@@ -169,6 +169,7 @@
     "cypress": "^5.1.0",
     "cypress-axe": "^0.8.1",
     "cypress-multi-reporters": "^1.4.0",
+    "cypress-plugin-snapshots": "^1.4.4",
     "deparam": "git+https://github.com/brettz9/deparam.git#updates",
     "es-dev-commonjs-transformer": "^0.2.0",
     "es-dev-server": "^1.57.4",
@@ -221,7 +222,9 @@
     "rimraf": "^3.0.2",
     "rollup": "2.26.11",
     "rollup-plugin-copy": "^3.3.0",
+    "rollup-plugin-filesize": "^9.0.2",
     "rollup-plugin-node-polyfills": "^0.2.1",
+    "rollup-plugin-progress": "^1.1.2",
     "rollup-plugin-re": "^1.0.7",
     "rollup-plugin-terser": "^7.0.2",
     "stackblur-canvas": "^2.4.0",