feat(eerror): Add main code and tests

src/index.js

@@ -0,0 +1,16 @@
+class EError extends Error {
+  constructor(message, ...args) {
+    super(message);
+    this.name = 'EError';
+
+    for (let i = 0; i < args.length; i += 1) {
+      if (typeof args[i] === 'object') {
+        Object.assign(this, args[i]);
+      } else {
+        this[`param${i + 1}`] = args[i];
+      }
+    }
+  }
+}
+
+module.exports = EError;

src/index.test.js

@@ -0,0 +1,12 @@
+import test from 'ava';
+import EError from './index';
+
+test('eerror - smoke test', (t) => {
+  t.notThrows(() => {
+    const error = new EError('Message', 'val1', { success: true });
+    t.true(error instanceof Error);
+    t.is(typeof error.stack, 'string');
+    t.is(error.param1, 'val1');
+    t.is(error.success, true);
+  });
+});