Update PHPUnit and ParaTest

.travis.yml

@@ -1,9 +1,9 @@
 language: php
 
 php:
-    - 7.1
     - 7.2
     - 7.3
+    - 7.4snapshot
 
 before_script:
     - composer install -o --no-ansi --no-suggest

composer.json

@@ -14,18 +14,18 @@
     },
     "require": {
         "php": "^7.1",
-        "brianium/paratest": "^2.2",
+        "brianium/paratest": "^3.0",
         "consistence/coding-standard": "^3.8",
         "cweagans/composer-patches": "^1.6",
         "infection/infection": "^0.12",
-        "php-mock/php-mock-phpunit": "^2.1",
+        "php-mock/php-mock-phpunit": "^2.2",
         "phpstan/phpstan": "^0.11",
         "phpstan/phpstan-deprecation-rules": "^0.11",
         "phpstan/phpstan-doctrine": "^0.11",
         "phpstan/phpstan-nette": "^0.11",
         "phpstan/phpstan-phpunit": "^0.11",
         "phpstan/phpstan-strict-rules": "^0.11",
-        "phpunit/phpunit": "^7.5",
+        "phpunit/phpunit": "^8.0",
         "slevomat/coding-standard": "^5.0",
         "squizlabs/php_codesniffer": "^3.4",
         "stesie/phpcs-doctrine-annotation-rules": "^1.2"

phpunit.xml

@@ -1,4 +1,4 @@
-<phpunit>
+<phpunit cacheResult="false">
     <testsuites>
         <testsuite name="Tests">
             <directory>tests</directory>