update devenv and readme

.travis.yml

@@ -1,6 +1,5 @@
 language: php
 php:
-- '5.6'
 - '7.2'
 - '7.3'
 - '7.4'

README.md

@@ -1,5 +1,6 @@
 [![Build Status](https://travis-ci.org/stklcode/wp-liveticker.svg?branch=master)](https://travis-ci.org/stklcode/wp-liveticker)
 [![Quality Gate](https://sonarcloud.io/api/project_badges/measure?project=de.stklcode.web.wordpress.plugins%3Awp-liveticker&metric=alert_status)](https://sonarcloud.io/dashboard?id=de.stklcode.web.wordpress.plugins%3Awp-liveticker)
+[![WP Plugin Version](https://img.shields.io/wordpress/plugin/v/stklcode-liveticker.svg)](https://wordpress.org/plugins/stklcode-liveticker/)
 [![Packagist Version](https://img.shields.io/packagist/v/stklcode/stklcode-liveticker.svg)](https://packagist.org/packages/stklcode/stklcode-liveticker)
 [![License](https://img.shields.io/badge/license-GPL%20v2-blue.svg)](https://github.com/stklcode/wp-liveticker/blob/master/LICENSE.md)
 
@@ -28,7 +29,7 @@ Easily add multiple livetickers, add them to posts with shortcode or use them as
 * RSS feed capability
 * Gutenberg block and shortcode to display liveticker
 * Add ticker to sidebar widgets
-* Ability to customise through CSS
+* Ability to customize through CSS
 * Localization support
 
 
@@ -59,9 +60,11 @@ You can deactivate the default stylesheet on the settings page and include your
 
 ### Does the liveticker work with caching?
 
-It strongly depends on the use case.
-If you update your ticker every 5 minutes, a caching time of 12 hours obviously makes no sense.
-However the AJAX update will fetch the latest ticks and update cached tickers  depending on the configured interval.
+If you activate AJAX updates (enabled by default), the JavaScript will automatically update the content, even when the 
+page is loaded from cached.
+
+If AJAX is disabled, it depends on your update and caching intervals. If you update your ticker every 5 minutes, a 
+caching time of 12 hours obviously makes no sense.
 
 
 ## Screenshots

composer.json

@@ -22,10 +22,10 @@
   },
   "require-dev": {
     "php": ">=5.2",
-    "consolidation/robo": "^1.4",
+    "consolidation/robo": "^2",
     "phpunit/phpunit": "*",
     "phpunit/php-code-coverage": "*",
-    "dealerdirect/phpcodesniffer-composer-installer": "^0.5",
+    "dealerdirect/phpcodesniffer-composer-installer": "^0.6",
     "slowprog/composer-copy-file": "~0.3",
     "squizlabs/php_codesniffer": "^3.5",
     "phpcompatibility/php-compatibility": "^9.3",

package.json

@@ -5,8 +5,8 @@
   "author": "Stefan Kalscheuer",
   "license": "GPL-2.0+",
   "devDependencies": {
+    "@wordpress/eslint-plugin": "^3.4.1",
     "eslint": "^6",
-    "@wordpress/eslint-plugin": "^3",
     "stylelint": "^13",
     "stylelint-config-wordpress": "^16"
   }