fix: add marked.min.js to package exports (#3035)

fix: add marked.min.js to export conditions

This change adds the minified js to the package's export
conditions.  This will allow projects using PnP to have access
to the script during build time.

package.json

@@ -25,6 +25,7 @@
       "default": "./lib/marked.cjs"
     },
     "./bin/marked": "./bin/marked.js",
+    "./marked.min.js": "./marked.min.js",
     "./package.json": "./package.json"
   },
   "repository": "git://github.com/markedjs/marked.git",