git remote doesn't tab-complete set-branches or set-url

[rkeithhill]

System Details

• posh-git version/path: 1.0.0-beta1
• PowerShell version: 6.0.2
• Git version: 2.16.1.windows.4
• Operating system name and version: Windows 10 1709

Issue Description

git remote set-<tab> only tab-completes set-head and not set-url or set-branches as this line of script implies it should:

posh-git/src/GitTabExpansion.ps1

Lines 267 to 268 in fc692c5

	# Handles git remote (rename|rm|set-head|set-branches|set-url|show|prune) <stash>
	"^remote.* (?:rename|rm|set-head|set-branches|set-url|show|prune).* (?<remote>\S*)$" {