Initial commit: Add package.json, README, LICENSE and config files

jest.config.js

@@ -0,0 +1,38 @@
+/** @type {import('ts-jest').JestConfigWithTsJest} */
+export default {
+  preset: 'ts-jest/presets/default-esm',
+  testEnvironment: 'node',
+  roots: ['<rootDir>/test', '<rootDir>/src'],
+  testMatch: ['**/*.test.ts'],
+  collectCoverageFrom: [
+    'src/**/*.ts',
+    '!src/**/*.d.ts',
+  ],
+  coverageDirectory: 'coverage',
+  coverageReporters: ['text', 'lcov', 'html'],
+  moduleFileExtensions: ['ts', 'js', 'json'],
+  transform: {
+    '^.+\\.ts$': ['ts-jest', {
+      tsconfig: {
+        target: 'ES2022',
+        module: 'NodeNext',
+        moduleResolution: 'NodeNext',
+        lib: ['ES2022'],
+        strict: true,
+        esModuleInterop: true,
+        skipLibCheck: true,
+        forceConsistentCasingInFileNames: true,
+        declaration: true,
+        declarationMap: true,
+        sourceMap: true,
+        resolveJsonModule: true,
+        allowSyntheticDefaultImports: true,
+        isolatedModules: true
+      },
+      useESM: true,
+    }],
+  },
+  moduleNameMapper: {
+    '^(\\.{1,2}/.*)\\.js$': '$1',
+  },
+};