Extension - Auto-Close Tag: Not working as expected

[bryphe]

The vscode-auto-close-tag plugin is not working as expected.

The issue is that the way Onivim is sending buffer updates / content changes is not compatible with the way vscode-auto-close-tag is checking for closing brackets:
https://github.com/formulahendry/vscode-auto-close-tag/blob/master/src/extension.ts#L104

Need to fix up our buffer updates (for perf, as well!)