Allow PHP 8 (#16)

* Allow PHP 8

Author: ddeboer

.styleci.yml

@@ -6,6 +6,3 @@ finder:
     path:
         - "src"
         - "tests"
-
-enabled:
-    - short_array_syntax

.travis.yml

@@ -17,14 +17,13 @@ matrix:
     fast_finish: true
     include:
           # Test with lowest dependencies
-        - php: 7.1
+        - php: 7.3
           env: COMPOSER_FLAGS="--prefer-stable --prefer-lowest" SYMFONY_DEPRECATIONS_HELPER="weak"
 
           # Test the latest stable release
-        - php: 7.1
-        - php: 7.2
         - php: 7.3
-          env: COVERAGE=true TEST_COMMAND="composer test-ci" DEPENDENCIES="henrikbjorn/phpspec-code-coverage:^1.0"
+        - php: 7.4
+        - php: 8.0snapshot
 
           # Force some major versions of Symfony
         - php: 7.3
@@ -35,7 +34,7 @@ matrix:
           env: SYMFONY_REQUIRE="5"
 
           # Latest commit to master
-        - php: 7.3
+        - php: 8.0snapshot
           env: STABILITY="dev"
 
     allow_failures:

composer.json

@@ -11,12 +11,12 @@
         }
     ],
     "require": {
-        "php": "^7.1",
+        "php": "^7.3 || ^8.0",
         "symfony/stopwatch": "^3.4 || ^4.0 || ^5.0",
         "php-http/client-common": "^1.9 || ^2.0"
     },
     "require-dev": {
-        "phpspec/phpspec": "^2.5 || ^3.0 || ^4.0"
+        "phpspec/phpspec": "^7.0"
     },
     "autoload": {
         "psr-4": {