Use package.json repository property as a remote fallback

Things I tried, none worked:

• Fetching remote via terminal and refreshing
• Cloning the repo again in a separate folder
• Switching to pre-release

PS C:\Github\Tyriar\xterm.js> git remote -v
origin  https://github.com/Tyriar/xterm.js (fetch)
origin  https://github.com/Tyriar/xterm.js (push)
upstream        https://github.com/xtermjs/xterm.js.git (fetch)
upstream        https://github.com/xtermjs/xterm.js.git (push)
xtermjs https://github.com/xtermjs/xterm.js.git (fetch)
xtermjs https://github.com/xtermjs/xterm.js.git (push)

Output from GH PR output channel:

[Info] C:\Users\Daniel\.ssh\config: ENOENT: no such file or directory, open 'C:\Users\Daniel\.ssh\config'
[Info] TemporaryState> Error in initialization: Unable to delete nonexistent file 'c:\Users\Daniel\AppData\Roaming\Code - Insiders\User\globalStorage\github.vscode-pull-request-github\temp'
[Info] Registering git provider
[Info] Looking for git repository
[Info] Found 1 repositories during activation
[Info] Git repository found, initializing review manager and pr tree view.
[Info] Review> Validate state in progress
[Info] Review> Validating state...
[Info] No remotes found. The following remotes are missing: origin, ups
[Info] No GitHub remotes found
[Info] Review> Queuing additional validate state
[Info] Review> Validating state...
[Info] Found GitHub remote
[Info] Review> no matching pull request metadata found for current branch deprecated_event
[Info] Review> no matching pull request metadata found on GitHub for current branch deprecated_event
[Info] Review> Queuing additional validate state
[Info] Review> Validating state...
[Info] Found GitHub remote
[Info] Review> no matching pull request metadata found for current branch master
[Info] Review> no matching pull request metadata found on GitHub for current branch master

Version info:

Version: 1.64.0-insider (user setup)
Commit: e8a26d3ebf5095d4324ad4bf794787540ed3b33e
Date: 2021-12-21T05:15:30.501Z
Electron: 13.5.2
Chromium: 91.0.4472.164
Node.js: 14.16.0
V8: 9.1.269.39-electron.0
OS: Windows_NT x64 10.0.22000

GHPRI v0.34.2