feat: only one parameter in the constructor

BREAKING CHANGE: Instead of `new KeyvLru(100, {...})` use `new KeyvLru({ max: 100, ... }`.

.emdaer/docs/install.md

@@ -17,11 +17,12 @@ Create your Keyv object by executing:
 
 ```js
 const options = {
+  max: 1000,
   notify: false,
   ttl: 0,
   expire: 0,
 };
-const keyvLru = new KeyvLru(max, options);
+const keyvLru = new KeyvLru(options);
 ```
 
 See [`tiny-lru`](https://www.npmjs.com/package/tiny-lru) to learn about the

src/KeyvLru.js

@@ -12,14 +12,14 @@ class KeyvLru implements MapInterface {
   cache: Object;
 
   constructor(
-    max: number,
     options: {
+      max: number,
       notify?: boolean,
       ttl?: number,
       expire?: number,
-    } = {}
+    } = { max: 500 }
   ) {
-    this.cache = lru(max, options.notify, options.ttl, options.expire);
+    this.cache = lru(options.max, options.notify, options.ttl, options.expire);
   }
 
   clear(): void {

src/KeyvLru.test.js

@@ -3,15 +3,15 @@ const KeyvLru = require('./KeyvLru');
 describe('KeyvLru', () => {
   test('constructor', () => {
     expect.assertions(2);
-    const sut = new KeyvLru(1);
+    const sut = new KeyvLru();
     expect(sut.cache).not.toBeUndefined();
     expect(sut).toBeInstanceOf(KeyvLru);
   });
   describe('KeyvLru methods', () => {
     let sut;
 
     beforeEach(() => {
-      sut = new KeyvLru(100);
+      sut = new KeyvLru({ max: 100 });
     });
 
     afterEach(() => {