rev version to v2020.4.3-preview and Update CL#2635

TylerLeonhardt merged 1 commit intoPowerShell:masterPowerShell/vscode-powershell:masterfrom

TylerLeonhardt:rev-version-to-v2020.4.3-preview-update-clTylerLeonhardt/vscode-powershell:rev-version-to-v2020.4.3-preview-update-clCopy head branch name to clipboard