Fix Flaky WebAuthn Shim Test

[nlordell]

Fixes #369

This PR bumps the version of @simplewebauthn/server to include a fix to which was causing flacky tests for our WebAuthn shim. It turns out that the library was not correctly dealing with leading zeros in the signature r or s values, which would cause the test to periodically fail (since the signature was random in each run - as both the private key and the challenge were randomly generated, meaning that we would occasionally have an r or s value with a leading 0 byte).

[coveralls]

Pull Request Test Coverage Report for Build 10058774386

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

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Totals
Change from base Build 10041242450:	0.0%
Covered Lines:	92
Relevant Lines:	92

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💛 - Coveralls