chore(deps): update dependency grpc/grpc-swift to v1.19.0

[renovate]

This PR contains the following updates:

Package	Update	Change
grpc/grpc-swift	minor	1.18.0 -> 1.19.0

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Release Notes

grpc/grpc-swift (grpc/grpc-swift)

v1.19.0: gRPC Swift 1.19.0

Compare Source

SemVer Minor

• Add bind and connect APIs for VSOCK sockets (#​1636)

SemVer Patch

• Only schedule a close if the ping was actually sent (#​1626, patch credit to @​marhas)
• Add note about SPM plugin known issues, provide better errors (#​1629)
• Bump version number to 1.19.0 (#​1637)

Other Changes

• Update expired test certs (#​1627)

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