chore(deps): update dependency @grpc/proto-loader to ^0.6.0

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@grpc/proto-loader (source)	^0.5.0 -> ^0.6.0

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Release Notes

grpc/grpc-node

v0.6.0

Compare Source

• Add internal APIs for name resolution and load balancing, with basic implementations. This is also a general rework of how connections are established and maintained. (#​1015). This change includes the following bug fixes:
  • Calls on channels that quickly fail to establish a connection will end with an UNAVAILABLE error instead of waiting forever or until the call deadline. The waitForReady option to override that behavior is now supported. (#​896)
  • Channels with no calls no longer keep the event loop alive. (#​767)
• Return UNAVAILABLE status instead of INTERNAL when the underlying TCP connection disconnects (#​1042).

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