add reflect-metadata for git locator-host, build git-locator-host for…

[fanyipin]

… commonjs

Fix git process exception

How to test

Follow-ups

• add @theia/git package
• yarn start
• init git
• watch git diff files in git widget

Review checklist

• As an author, I have thoroughly tested my changes and carefully followed the review guidelines

Reminder for reviewers

• As a reviewer, I agree to behave in accordance with the review guidelines

[jfaltermeier]

Thank you for the fix. I can confirm that this fixes the issue:

[fanyipin]

Thank you for the fix. I can confirm that this fixes the issue:

Thank you for the approval! I look forward to contributing more to this project in the future