Update circle image setup and readme urls

Author: refucktor

.circleci/config.yml

@@ -1,7 +1,7 @@
 defaults: &defaults
   working_directory: ~/antd-scss-theme-plugin
   docker:
-    - image: circleci/node:8.11.3
+    - image: circleci/node:12.14.1
 
 whitelist: &whitelist
   paths:

README.md

@@ -47,7 +47,7 @@ With it you can:
 This plugin is published as [antd-scss-theme-plugin](https://www.npmjs.com/package/@inventum/antd-scss-theme-plugin) on `npm`:
 
 ```bash
-npm install --save-dev antd-scss-theme-plugin
+npm install --save-dev @inventium/antd-scss-theme-plugin
 ```
 
 It extends the functionality of a `antd`, `less-loader` and `sass-loader` to accomplish its goals.