Test pages for test assertions 4.3 and 5.3
Merge branch '43and53' of https://github.com/ArtemAntonets/web-platform-tests-msft into submission/Microsoft/PointerEvents3
Mutation Obverser tests
Fixed test descriptions. s/set(className/set(classname/
Avoid timeout on empty mutation
Don't crash if Range isn't supported
Use document.createRange instead
target could be a function
document parsing mutations
Added another twisted script insertion
Inserting a script trigger the insertion of the children first before triggering the parent
New
Fixed Range setup
Added TreeWalker tests
Properly check for async events related to capture
Better test setup
Remove dupe submission for Pointer Events TA4.3
Lostpointercapture for disconnected node
setPointerCapture() on disconnected node throws InvalidStateError
Address review comments