Add project readme with info

README.md

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+# Info about library
+
+This library will serve to generate lists of random numbers with the specified length,...
+
+# Installation
+
+```sh
+npm install random-int-list --save
+```
+
+# Usage
+
+## JS
+
+```sh
+var t = require('random-int-list');
+console.log(t.randomIntList(5, 1, 5));
+```
+
+Result => [ 1, 3, 5, 4, 2]
+
+## Typescript
+
+```typescript
+import { randomIntList } from 'random-int-list');
+console.log(randomIntList(5, 1, 5));
+```
+
+Result => [ 1, 3, 5, 4, 2]