opensensor 0.4.0

A crate for streaming and archiving measurements from sensors
# OpenSensor-rs Pull Request

## Please check if the PR fulfills these requirements

- [ ] My commit message follows our guidelines
- [ ] My code follows out style guidelines
- [ ] I have performed a self-review of my code
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- [ ] I have added/updated the docs
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- [ ] I have added tests that prove my fix is effective or that my feature works
- [ ] New and existing unit & integration tests pass locally with my changes
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## What kind of change does this PR introduce? (bug fix, feature, docs update, ...)



## What is the current behavior? (link to an open issue here)



## What is the new behavior (if this is a feature change)?



## Does this PR introduce a breaking change (to internal or exernal APIs)?



## Other information