CI: update travis

.travis.yml

@@ -1,54 +1,65 @@
 language: php
 php:
-    - 7.1
-    - 7.2
+- 7.1
+- 7.2
+- 7.3
+
+before_install:
+# Turn off XDebug
+- phpenv config-rm xdebug.ini || return 0
 
 install:
-  # Composer
-  - travis_retry composer install --no-progress --prefer-dist
+# Composer
+- travis_retry composer install --no-progress --prefer-dist
 
 script:
-  # PhpUnit
-  - composer run-script phpunit
+# Check all dependencies at master are up-to-date when running regular builds
+- |
+  if [[ $TRAVIS_EVENT_TYPE == "cron" && $TRAVIS_BRANCH == "master" ]]; then
+      composer outdated --direct --strict
+  fi
+
+# Tests
+- composer run-script phpunit
+
+after_failure:
+# Print *.actual content
+- for i in $(find tests -name \*.actual); do echo "--- $i"; cat $i; echo; echo; done
 
 jobs:
   include:
-    - env: title="Lowest Dependencies 7.1"
-      php: 7.1
-      install:
-        - travis_retry composer update --no-progress --prefer-dist --prefer-lowest
-      script:
-        - composer run-script phpunit
-
-    - stage: Quality Assurance
-      php: 7.1
-      script:
-        - composer run-script qa
-
-    - stage: Test Coverage
-      php: 7.1
-      script:
-        - composer run-script coverage
-      after_script:
-        - wget https://github.com/satooshi/php-coveralls/releases/download/v1.0.1/coveralls.phar
-        - php coveralls.phar --verbose --config tests/.coveralls.yml
-
-    - stage: Phpstan
-      php: 7.1
-      script:
-        - composer run-script phpstan-install
-        - composer run-script phpstan
+  - env: title="Lowest Dependencies 7.1"
+    php: 7.1
+    install:
+    - travis_retry composer update --no-progress --prefer-dist --prefer-lowest
+    script:
+    - composer run-script phpunit
 
-  allow_failures:
-    - stage: Test Coverage
-    - stage: Phpstan
+  - stage: Quality Assurance
+    php: 7.1
+    script:
+    - composer run-script qa
 
-after_failure:
-  # Print *.actual content
-  - for i in $(find tests -name \*.actual); do echo "--- $i"; cat $i; echo; echo; done
+  - stage: Phpstan
+    php: 7.1
+    script:
+    - composer run-script phpstan-install
+    - composer run-script phpstan
+
+  - stage: Test Coverage
+    if: branch = master AND type = push
+    php: 7.1
+    script:
+    - composer run-script coverage
+    after_script:
+    - wget https://github.com/php-coveralls/php-coveralls/releases/download/v2.1.0/php-coveralls.phar
+    - php php-coveralls.phar --verbose --config tests/.coveralls.yml
+
+  allow_failures:
+  - stage: Test Coverage
 
 sudo: false
 
 cache:
   directories:
-    - $HOME/.composer/cache
+  - $HOME/.composer/cache