Merge pull request #13 from MarkRedeman/fix-error-format-deprecation

Change errorFormat to error-format

closes #15 
Thank you @MarkRedeman and @MarTango.

Author: zonuexe

phpstan.el

@@ -244,7 +244,7 @@ it returns the value of `SOURCE' as it is."
 (defun phpstan-get-command-args ()
   "Return command line argument for PHPStan."
   (let ((executable (phpstan-get-executable))
-        (args (list "analyze" "--errorFormat=raw" "--no-progress" "--no-interaction"))
+        (args (list "analyze" "--error-format=raw" "--no-progress" "--no-interaction"))
         (path (phpstan-normalize-path (phpstan-get-config-file)))
         (level (phpstan-get-level)))
     (when path