Dependencies in packages.json should be only from npmjs.

Description: In the dependencies there are two dependency which is pulled from github:
"debug": "ngokevin/debug#noTimestamp",
"document-register-element": "dmarcos/document-register-element#8ccc532b7f3744be954574caf3072a5fd260ca90",
These breaks the npm install if it runs behind a proxy which doesn't allow github.

Error:
npm ERR! Error while executing:
npm ERR! C:\Program Files\Git\cmd\git.EXE ls-remote -h -t ssh://git@github.com/ngokevin/debug.git
npm ERR!
npm ERR! ssh: connect to host github.com port 22: Connection refused
npm ERR! fatal: Could not read from remote repository.
npm ERR!
npm ERR! Please make sure you have the correct access rights
npm ERR! and the repository exists.
npm ERR!
npm ERR! exited with error code: 128

Error2:
npm ERR! Error while executing:
npm ERR! C:\Program Files\Git\cmd\git.EXE ls-remote -h -t ssh://git@github.com/dmarcos/document-register-element.git
npm ERR!
npm ERR! ssh: connect to host github.com port 22: Connection refused
npm ERR! fatal: Could not read from remote repository.
npm ERR!
npm ERR! Please make sure you have the correct access rights
npm ERR! and the repository exists.
npm ERR!
npm ERR! exited with error code: 128

• A-Frame Version: 0.9.2
• Platform / Device: Windows 10 behing proxy
• Reproducible Code Snippet or URL:

Inspect the dependency entries in packages.json and confirm how npm resolves the GitHub references. Replace the two GitHub sources with npmjs-hosted packages, then verify that npm install completes in the proxy-restricted Windows scenario without attempting to connect to GitHub.