Fixed disableAutoSignIn when using navigator.credentials

[TMSCH]

Call preventSilentAccess instead of the old API, requireUserMediation.

[codecov-io]

Codecov Report

Merging #59 into master will not change coverage. The diff coverage is 100%.

@@           Coverage Diff           @@
##           master      #59   +/-   ##
=======================================
  Coverage   91.46%   91.46%           
=======================================
  Files          34       34           
  Lines        1453     1453           
  Branches      192      192           
=======================================
  Hits         1329     1329           
  Misses        124      124

Impacted Files	Coverage Δ
ts/api/navigator_credentials.ts	93% <100%> (ø)	:arrow_up:

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[TMSCH]

Thanks Rahul!