bump up peerdid-swift

[kukgini]

bump up peerdid-swift version to 3.0.3 to avoid build issue.

[conanoc]

Can you elaborate on the build issue? Is it due to the Xcode upgrade?

[kukgini]

In the peerdid-swift version 3.0.0, the dependency on coredid-swift was from 2.0.0 to the next major.

However, coredid-swift changed an attribute name of a struct exposed as public in the 2.0.2 release. Specifically, DIDDocument.verificationMethods was changed to DIDDocument.verificationMethod. I believe this was done for aligning with the W3C standard. And, the peerdid-swift 3.0.0 already changed it's name to the new one (a.k.a. verficationMethod).

As a result, in an environment where package resolve was already at 2.0.1, the build could fail due to an attribute name mismatch. I submitted a PR to address this and it was included in 3.0.3.
see: beatt83/peerdid-swift#13