Remove PHP 7.3+ from testing

Author: dercoder

.travis.yml

@@ -4,8 +4,6 @@ php:
   - 7.0
   - 7.1
   - 7.2
-  - 7.3
-  - 7.4
 
 before_script:
   - composer install -n --dev --prefer-source

README.md

@@ -2,7 +2,7 @@
 
 **WebMoney driver for the Omnipay PHP payment processing library**
 
-[![Build Status](https://travis-ci.org/dercoder/omnipay-webmoney.svg?branch=master)](https://travis-ci.org/dercoder/omnipay-webmoney)
+[![Build Status](https://app.travis-ci.com/dercoder/omnipay-webmoney.svg?branch=master)](https://travis-ci.org/dercoder/omnipay-webmoney)
 [![Coverage Status](https://coveralls.io/repos/dercoder/omnipay-webmoney/badge.svg?branch=master&service=github)](https://coveralls.io/github/dercoder/omnipay-webmoney?branch=master)
 
 [![Latest Stable Version](https://poser.pugx.org/dercoder/omnipay-webmoney/v/stable.png)](https://packagist.org/packages/dercoder/omnipay-webmoney)
@@ -11,7 +11,7 @@
 [![License](https://poser.pugx.org/dercoder/omnipay-webmoney/license.png)](https://packagist.org/packages/dercoder/omnipay-webmoney)
 
 [Omnipay](https://github.com/omnipay/omnipay) is a framework agnostic, multi-gateway payment
-processing library for PHP 5.6+. This package implements [WebMoney](https://www.webmoney.az) support for Omnipay.
+processing library for PHP 7.0+. This package implements [WebMoney](https://www.webmoney.az) support for Omnipay.
 
 ## Installation
 
@@ -21,7 +21,7 @@ to your `composer.json` file:
 ```json
 {
     "require": {
-        "dercoder/omnipay-webmoney": "~3.0"
+        "dercoder/omnipay-webmoney": "~4.0"
     }
 }
 ```