Update repo references from GitLab to GitHub

[dsample]

I've only just taken a look at the package, but on the NPM page it shows a links to a non-existant GitLab repo, rather than this GitHub repo. The following references in need to be updated:

The package homepage

webauthn/package.json

Line 46 in d8d63d2

"homepage": "https://gitlab.com/strangerlabs/webauthn",

and the bugs URL

webauthn/package.json

Line 44 in d8d63d2

"url": "https://gitlab.com/strangerlabs/webauthn/issues"

[codecov]

Codecov Report

Merging #38 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #38   +/-   ##
=======================================
  Coverage   12.66%   12.66%           
=======================================
  Files           5        5           
  Lines         387      387           
=======================================
  Hits           49       49           
  Misses        338      338           

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