chore: 🤖 add 1.8 support message to package.json

Closes: #7091

Author: Portugal

README.md

@@ -51,7 +51,7 @@ You can use [jsdelivr.com](https://www.jsdelivr.com)'s cdn url to access the fil
 
 # Angular Compatibility
 
-UI-Grid is currently compatible with Angular versions ranging from 1.4.x to 1.7.x.
+UI-Grid is currently compatible with Angular versions ranging from 1.4.x to 1.8.x.
 
 # Feature Stability
 

lib/grunt/plugins.js

@@ -329,7 +329,7 @@ module.exports = function(grunt) {
       'main': bwr.main,
       'ignore': [],
       'dependencies': {
-        'angular': '>=1.4.0 1.7.x'
+        'angular': '>=1.4.0 1.8.x'
       },
       'repository': pkg.repository,
       'homepage': 'http://ui-grid.info',