Propety spelling mistake in README.md

[kenchris]

"according to the rules for the attribute propety option"

Propety spelled wrong

[kenchris]

A double dot issue as well

"Setting properties inside this method will not trigger another update.."

[kenchris]

And logic issue: "without triggering another update. This happens if a property is set inside updated()"

Without - this happens.

Maybe "this could have happened"?

[kenchris]

This sentence also makes no sense. It is like it is supposed to be followed by something:

"When the element is first connected or a property is set (e.g. element.foo = 5) and the property's hasChanged(value, oldValue) returns true."

[kenchris]

"update(changedProperties): Updates the element. Setting properties inside this method will not trigger the element to update."

Sounds like setting a property will stop the current update from taking effect