### Bug fixes

Fix a bug that caused line decorations with a `class` property to suppress all other line decorations for that line.

Fix a bug that caused scroll effects to be corrupted when further updates came in before they were applied.

Fix an issue where, depending on which way a floating point rounding error fell, `posAtCoords` (and thus vertical cursor motion) for positions outside of the vertical range of the document might or might not return the start/end of the document.