refactor: Modern(-ish) ESM only (#129)

* chore: Correct TS module resolution mismatch

* chore: Update eslint config

* refactor: User terser as build script, cull leftover export formats

Author: rschristian

eslint.config.mjs

@@ -0,0 +1,18 @@
+import { defineConfig } from 'eslint/config';
+import js from '@eslint/js';
+import globals from 'globals';
+import compat from 'eslint-plugin-compat';
+
+export default defineConfig([
+	compat.configs['flat/recommended'],
+	{
+		files: ['src/index.js'],
+		plugins: { js },
+		extends: ['js/recommended'],
+		languageOptions: {
+			globals: globals.browser,
+			ecmaVersion: 2020,
+			sourceType: 'module',
+		},
+	},
+]);

jsconfig.json

@@ -2,7 +2,7 @@
 	"compilerOptions": {
 		"target": "ESNext",
 		"module": "NodeNext",
-		"moduleResolution": "Node",
+		"moduleResolution": "NodeNext",
 		"noEmit": true,
 		"allowJs": true,
 		"checkJs": true,