Functions 1.0.11913

In this release:

• Improvements to EventHub/ServiceBus error handling (#Azure/azure-webjobs-sdk#1784, Azure/azure-webjobs-sdk#1760)
• Fix FunctionExecutor null ref (Azure/azure-webjobs-sdk#1741)
• Fixes for EventHubTrigger checkpointing (Azure/azure-webjobs-sdk#1752)
• Fix for secret file corruption issue (#3059)
• Gating host specialization on WEBSITE_CONFIGURATION_READY (#2867)
• update eventgrid extension to 1.0.0
• Allow DocumentDB protocol to be configured via host.json