Update to latest core-js

Per a deprecation warning:

> core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.

This bumps core-js to 3.44.0, latest stable version as of this writing.

Author: phildarnowsky-broad

browser/package.json

@@ -26,7 +26,7 @@
     "@visx/legend": "^3.12.0",
     "@visx/scale": "^3.12.0",
     "@visx/shape": "^3.12.0",
-    "core-js": "3.5.0",
+    "core-js": "3.44.0",
     "css-loader": "^6.7.3",
     "d3-array": "^1.2.4",
     "d3-scale": "^2.2.2",