fix: add proper ESM exports in package.json

Co-authored-by: An Phi <aphi@skidmore.edu>

Author: akphi

.eslintrc.js .eslintrc.cjs.eslintrc.js renamed to .eslintrc.cjs

@@ -1,4 +1,7 @@
 {
   "presets": ["@babel/preset-env", "@babel/preset-typescript"],
-  "plugins": ["@babel/plugin-proposal-object-rest-spread"]
+  "plugins": [
+    "@babel/plugin-proposal-object-rest-spread",
+    "@babel/plugin-syntax-import-assertions"
+  ]
 }