fix: Incorrect extension removal in polyfill name replacement

[rschristian]

Well this was a fun one to find...

Notably, it'll incorrectly convert core-js/modules/es.json.to-string-tag.js into core-js/modules/eson.to-string-tag.js. Funky name, to be fair.

console.warn
    'core-js/modules/eson.to-string-tag.js' is imported by entry, but could not be resolved – treating it as an external dependency

      at Graph.defaultOnWarn [as onwarn] (../../node_modules/optimize-plugin/node_modules/rollup/dist/shared/node-entry.js:13596:17)
      at Graph.warn (../../node_modules/optimize-plugin/node_modules/rollup/dist/shared/node-entry.js:13404:14)
      at ModuleLoader.handleResolveId (../../node_modules/optimize-plugin/node_modules/rollup/dist/shared/node-entry.js:12412:24)
      at ModuleLoader.<anonymous> (../../node_modules/optimize-plugin/node_modules/rollup/dist/shared/node-entry.js:12298:30)
      at fulfilled (../../node_modules/optimize-plugin/node_modules/rollup/dist/shared/node-entry.js:38:28)

[qeleb]

@developit take a look at this? 🙏🏼

[rschristian]

@developit Friendly ping, if you can take a peek.

Finally trying to push through a CLI v4 (or get it to a reviewable state, anyhow) and was reminded this is still an "issue" (not sure if it's likely to cause any actual problems, but it is a tad noisy).

[developit]

ha! damn me.