travis: finely segmented matrix, added PhpStan

.travis.yml

@@ -26,18 +26,29 @@ after_failure:
 
 jobs:
     include:
-        -   stage: Code Standard Checker
+        -   name: Nette Code Checker
-            php: 7.1
             install:
-                # Install Nette Code Checker
                 - travis_retry composer create-project nette/code-checker temp/code-checker ^3 --no-progress
-                # Install Nette Coding Standard
-                - travis_retry composer create-project nette/coding-standard temp/coding-standard ^2 --no-progress
             script:
                 - php temp/code-checker/code-checker --strict-types
+
+
+        -   name: Nette Coding Standard
+            install:
+                - travis_retry composer create-project nette/coding-standard temp/coding-standard ^2 --no-progress
+            script:
                 - php temp/coding-standard/ecs check src tests examples --config tests/coding-standard.yml
 
 
+        -   stage: Static Analysis (informative)
+            install:
+                # Install PHPStan
+                - travis_retry composer create-project phpstan/phpstan-shim temp/phpstan --no-progress
+                - travis_retry composer install --no-progress --prefer-dist
+            script:
+                - php temp/phpstan/phpstan.phar analyse --autoload-file vendor/autoload.php --level 5 src
+
+
         -   stage: Code Coverage
             script:
                 - vendor/bin/tester -p phpdbg tests -s --coverage ./coverage.xml --coverage-src ./src
@@ -47,7 +58,7 @@ jobs:
 
 
     allow_failures:
-        -   php: 7.2
+        -   stage: Static Analysis (informative)
         -   stage: Code Coverage