Add CHANGELOG.md and create git tags for past npm releases

Author: Krinkle

CHANGELOG.md

@@ -0,0 +1,18 @@
+- v2.1.0:
+  - date: 2020-07-27
+  - changes:
+    - Update "chalk" and "lodash" dependencies ([#9](https://github.com/gruntjs/grunt-legacy-log-utils/pull/9))
+    - Require Node.js 10 or later
+- v2.0.1:
+  - date: 2018-05-19
+  - changes:
+    - Update dev dependencies ([#7](https://github.com/gruntjs/grunt-legacy-log-utils/pull/9))
+- v2.0.0:
+  - date: 2018-05-17
+  - changes:
+    - Update "chalk" and "lodash" dependencies ([#5](https://github.com/gruntjs/grunt-legacy-log-utils/pull/9))
+    - Require Node.js 6 or later
+- v1.0.0
+  - date: 2016-02-13
+  - changes:
+    - Replace colors with chalk and remove underscore.string ([a67ce8940d](https://github.com/gruntjs/grunt-legacy-log-utils/commit/a67ce8940d))

README.md

@@ -3,3 +3,4 @@
 
 [![Build Status](https://github.com/gruntjs/grunt-legacy-log-utils/workflows/Tests/badge.svg)](https://github.com/gruntjs/grunt-legacy-log-utils/actions?workflow=Tests)
 [![Built with Grunt](https://gruntjs.com/builtwith.svg)](https://gruntjs.com/)
+[![npm](https://img.shields.io/npm/v/grunt-legacy-log-utils.svg?style=flat)](https://www.npmjs.com/package/grunt-legacy-log-utils)