PHP 7.2+ Support

* Updated the composer.json to require PHP 7.2, removed Travis CI tests for all PHP versions prior to 7.2 and replace jimdo/prometheus_client_php with endclothing/prometheus_client_php to support PHP 7.2.

* Updated PHPUnit to v8 and Mockery to v1.4 in order to support PHP 7.4.

* Downgraded Mockery from 1.4 to 1.3 in order to support PHP versions < 7.3.

.travis.yml

@@ -1,11 +1,9 @@
 language: php
 
 php:
-  - 5.6
-  - 7.0
-  - 7.1
   - 7.2
   - 7.3
+  - 7.4
 
 before_install:
   - echo "extension = redis.so" >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini

composer.json

@@ -9,10 +9,10 @@
     }
   ],
   "require": {
-    "php": ">=5.6.0",
+    "php": ">=7.2.0",
     "illuminate/support": "^5.3 || ^6.0 || ^7.0",
     "illuminate/routing": "^5.3 || ^6.0 || ^7.0",
-    "jimdo/prometheus_client_php": "^0.9.0"
+    "endclothing/prometheus_client_php": "^1.0"
   },
   "autoload": {
     "psr-4": {
@@ -34,7 +34,7 @@
     }
   },
   "require-dev": {
-    "phpunit/phpunit": "^5.5",
+    "phpunit/phpunit": "^8",
-    "mockery/mockery": "^0.9.5"
+    "mockery/mockery": "^1.3"
   }
 }

phpunit.xml

@@ -8,7 +8,6 @@
          convertWarningsToExceptions="true"
          processIsolation="false"
          stopOnFailure="false"
-         syntaxCheck="true"
          verbose="true"
 >
     <testsuites>