[NOJIRA] Prepare for release of 2.2.3 (#60)

* chore: bump version to 2.2.3

* chore: add changelog for 2.2.3

* chore: bump tested up to

* chore: add grunt-cli

Allows us to run grunt tasks for release prep without having
to install grunt globally.

For example:

```sh
npx grunt checktextdomain
npx grunt makepot
```

* chore: upgrade grunt-wp-i18n

`npx grunt makepot` fails otherwise.

* chore: regenerate pot file

By running `npx grunt makepot`.

No changes to strings, just updates to the version and dates.

package.json

@@ -5,11 +5,11 @@
     "type": "git",
     "url": "https://github.com/copyblogger/genesis-simple-sidebars"
   },
-  "dependencies": {},
   "devDependencies": {
     "grunt": "^0.4.5",
     "grunt-autoprefixer": "^0.8.1",
     "grunt-checktextdomain": "^0.1.1",
+    "grunt-cli": "^1.4.3",
     "grunt-contrib-cssmin": "^0.10.0",
     "grunt-contrib-imagemin": "^0.7.1",
     "grunt-contrib-jshint": "^0.10.0",
@@ -20,7 +20,7 @@
     "grunt-jsvalidate": "^0.2.2",
     "grunt-phplint": "0.0.5",
     "grunt-styledocco": "^0.1.4",
-    "grunt-wp-i18n": "^0.4.7",
+    "grunt-wp-i18n": "^1.0.3",
     "load-grunt-tasks": "^0.6.0"
   },
   "plugin": {
@@ -29,7 +29,7 @@
     "description": "Genesis Simple Sidebars allows you to easily create and use new sidebar widget areas.",
     "author": "StudioPress",
     "authoruri": "http://www.studiopress.com/",
-    "version": "2.2.2",
+    "version": "2.2.3",
     "license": "GPL-2.0+",
     "licenseuri": "http://www.gnu.org/licenses/gpl-2.0.html",
     "textdomain": "genesis-simple-sidebars"