apollographql/router v0.1.0-preview.0 on GitHub

🎉 The Apollo Router has graduated to its Preview phase! 🎉

For more information on what's expected at this stage, please see our release stages.

Header propagation by name only fixed (PR #709)
Previously rename and default values were required (even though they were correctly not flagged as required in the json schema).
The following will now work:
```
headers:
  all:
  - propagate:
      named: test
```
Fix OTLP hang on reload (PR #711)
Fixes hang when OTLP exporter is configured and configuration hot reloads.