Update Travis CI configuration

Adds builds on PHP 7.4
Removes HHVM builds
Adds builds with mockery 1.3

Author: michalbundyra

.travis.yml

@@ -1,31 +1,28 @@
 language: php
 
-sudo: false
-
 cache:
   directories:
     - $HOME/.composer/cache
 
 env:
   - MOCKERY_VERSION=dev-master
+  - MOCKERY_VERSION=~1.3.0
   - MOCKERY_VERSION=~1.2.0
   - MOCKERY_VERSION=~1.1.0
   - MOCKERY_VERSION=~1.0.0
   - MOCKERY_VERSION=~0.9.0
   - MOCKERY_VERSION=~0.8.0
 
 php:
+  - 7.4
   - 7.3
   - 7.2
   - 7.1
   - 7.0
   - 5.6
-  - hhvm
 
 matrix:
   fast_finish: true
-  allow_failures:
-    - php: hhvm
 
 install:
   - composer require mockery/mockery:${MOCKERY_VERSION} squizlabs/php_codesniffer phpmd/phpmd cundd/test-flight