Update package.json

If this is ok then yes! I just see that LTS (https://nodejs.org/en/about/releases/) it is supported right now so it is viable to give some time. I don't know how much people use v12 and this library

Co-authored-by: Daniel Roe <daniel@roe.dev>

package.json

@@ -22,7 +22,6 @@
       "require": "./dist/module.js",
       "import": "./dist/module.es.js"
     },
-    "./": "./",
     "./*": "./*",
     "./sanity-content": "./dist/components/sanity-content.js",
     "./sanity-file": "./dist/components/sanity-file.js",