Merge pull request #52 from SignpostMarv/patch-3

phpunit 9 was released

.travis.yml

@@ -3,14 +3,15 @@ php:
     - 7.1
     - 7.2
     - 7.3
-    - 7.4 # Psalm does not support 7.4 yet (uses Fn)
+    - 7.4
 before_install:
     - phpenv config-rm xdebug.ini || true
     - composer clear-cache
 
 install:
   - composer install
-  - if [[ "$DEPS" = 'high' ]]; then travis_retry composer $DEFAULT_COMPOSER_FLAGS update; fi
+  - if [[ "$DEPS" = 'high' || "$DEPS" = 'dev' ]]; then travis_retry composer $DEFAULT_COMPOSER_FLAGS update; fi
+  - if [[ "$DEPS" = 'high' ]]; then composer require $DEFAULT_COMPOSER_FLAGS --prefer-stable vimeo/psalm; fi
   - if [[ "$DEPS" = 'low' ]]; then travis_retry composer $DEFAULT_COMPOSER_FLAGS --prefer-lowest --prefer-stable update; fi
   - if [[ "$DEPS" = 'stable' ]]; then travis_retry composer $DEFAULT_COMPOSER_FLAGS --prefer-stable update; fi
   - ./vendor/bin/psalm --version
@@ -22,5 +23,20 @@ env:
         - DEPS="low"
         - DEPS="high"
         - DEPS="stable"
+        - DEPS="dev"
     global:
         - DEFAULT_COMPOSER_FLAGS="--no-interaction --no-suggest"
+
+cache:
+  directories:
+    - ./vendor
+
+allow_failures:
+    - php: 7.1
+      env: DEPS="dev"
+    - php: 7.2
+      env: DEPS="dev"
+    - php: 7.3
+      env: DEPS="dev"
+    - php: 7.4
+      env: DEPS="dev"

composer.json

@@ -10,7 +10,7 @@
         }
     ],
     "require": {
-        "phpunit/phpunit": "^6.0 || ^7.0 || ^8.0",
+        "phpunit/phpunit": "^6.0 || ^7.0 || ^8.0 || ^9.0",
         "vimeo/psalm": "^3.6.2 || dev-master",
         "composer/semver": "^1.4",
         "ocramius/package-versions": "^1.3"