Merge release 0.8.1 into 0.9.x#30

sandrokeil merged 7 commits into0.9.xopen-code-modeling/php-code-ast:0.9.xfrom

0.8.x-merge-up-into-0.9.x_5fac59d2c22b73.89506518open-code-modeling/php-code-ast:0.8.x-merge-up-into-0.9.x_5fac59d2c22b73.89506518Copy head branch name to clipboard