Readme formatting, GitHub repo owner update and tested with WP bump (#311)

- Move from `georgestephanis/two-factor` to `wordpress/two-factor` per project migration.
- Update `readme.txt` formatting to use line breaks per `.editorconfig.
- Update Node dev dependencies.
- Mark as tested with the latest version of WordPress 5.3.

Author: kasparsd

.travis.yml

@@ -1,11 +1,14 @@
+dist: trusty
+
 language: php
 
 php:
-  - 5.4
-  - 5.5
-  - 5.6
-  - 7.2
-  - 7.3
+  - "5.4"
+  - "5.5"
+  - "5.6"
+  - "7.2"
+  - "7.3"
+  - "7.4"
 
 addons:
   apt:

composer.json

@@ -1,6 +1,6 @@
 {
   "type": "wordpress-plugin",
-  "name": "georgestephanis/two-factor",
+  "name": "wordpress/two-factor",
   "description": "Two-Factor Authentication for WordPress.",
   "require": {
     "php": ">=5.4"