Run the File API tests.
auto merge of #4370 : Ms2ger/servo/test-fileapi, r=jdm
Make ErrorEvent::new take cancelable and bubbling enums
auto merge of #4372 : thiagopnts/servo/errorevent, r=Ms2ger

Fixes #4174.
Correctly set the BlobType for File objects.
Update rust.
h5e.
Update stb
png
xxhash
gl
js
Revert "js"

This reverts commit 94e238d793086f2add754cf5cb16c040e7f1b20b.
encoding
xml
sc
uuid
semver
cssparser
glfw