html5validator emits a lot of warnings after update

[php-coder]

There is a lot of new warnings after updating to html5validator to 0.3.2: https://travis-ci.org/php-coder/mystamps/jobs/616310191

Let's fix them. Also pin the version of html5validator to make build stable. Also we need to find out why warning didn't fail a build.

[php-coder]

There is a lot of new warnings after updating to html5validator to 0.3.2

It's html5validator regression: svenkreiss/html5validator#64

[php-coder]

Also we need to find out why warning didn't fail a build.

It were errors actually and it's not clear why it didn't fail indeed. I'll look on it later.