fix imports and jest config to work properly as esmodule

.tool-versions

@@ -0,0 +1 @@
+nodejs 18.20.4

eslint.config.mjs

@@ -16,10 +16,11 @@ export default [
   {
     ignores: [
       'node_modules/',
-      'lib/'
+      'lib/',
+      'coverage/'
     ]
   },
-  ...compat.extends('plugin:@typescript-eslint/recommended', 'prettier'),
+  ...compat.extends('plugin:@typescript-eslint/eslint-recommended', 'plugin:@typescript-eslint/recommended', 'prettier'),
   {
     languageOptions: {
       parser: tsParser,

jest.config.js

@@ -1,17 +1,22 @@
 const config = {
-  moduleFileExtensions: ['js', 'ts'],
+  moduleFileExtensions: ["js", "ts"],
   transform: {
-    '^.+\\.(js|jsx|ts|tsx)$': [
-      'ts-jest',
+    "^.+\\.(ts|tsx)$": [
+      "ts-jest",
       {
-        tsconfig: '<rootDir>/test/tsconfig.json'
-      }
-    ]
+        tsconfig: "<rootDir>/test/tsconfig.json",
+        useESM: true,
+      },
+    ],
   },
-  testMatch: ['**/test/**/*.test.(ts|js)'],
-  testEnvironment: 'node',
-  setupFilesAfterEnv: ['jest-extended/all'],
-  preset: 'ts-jest'
-}
+  extensionsToTreatAsEsm: [".ts"],
+  moduleNameMapper: {
+    "^(\\.{1,2}/.*)\\.js$": "$1",
+  },
+  testMatch: ["**/test/**/*.test.(ts|js)"],
+  testEnvironment: "node",
+  setupFilesAfterEnv: ["jest-extended/all"],
+  preset: "ts-jest",
+};
 
-export default config
+export default config;