CSHS-CWRA / RavenPy / 14473983006

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github

Committed by web-flow

Commit Message

Make installation of the `raven_hydro` library optional (#486)

### What kind of change does this PR introduce?

* Moves the `raven-hydro` and RHF-handling code to the top-level
imports.
* Adds a new `ravenpy[raven-hydro]` pip recipe. 
* Adds a test that temporarily renders the `raven_hydro` and `raven`
binary invisible using `monkeypatch` to test import behaviour.

### Does this PR introduce a breaking change?

Yes. `raven-hydro` now needs to be explicitly installed. Users should be
told to use the `pip` recipe, since the `raven-hydro` package hosted on
`conda-forge` needs to be installed with an explicitly-defined version
(e.g. `==0.4.0`).

Run Details

23 of 26 new or added lines in 6 files covered. (88.46%)

1 existing line in 1 file now uncovered.

3556 of 4331 relevant lines covered (82.11%)

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