Build-rs

[ChristianBeilschmidt]

I did the following things:

1. Removed anyhow from our build-dependencies and just unwrapped the result in the build.rs file.
2. Clippy wanted to add #[must_use] labels to functions that take &self and return Self. This makes sense since not using would mean you did something wrong.
3. The arrow example was not working anymore 🤷. I changed the pointer cast. Fortunately, it seems that our in-code conversions still work.
4. I updated tokio and could remove some Clippy lint exclusions (// TODO: remove when https://github.com/tokio-rs/tokio/issues/4245 is fixed).
5. I updated Actix-web and they removed AnyBody. This means I had to wrap our error handler differently. You now have to put it into an EitherBody-enum and this takes a BoxBody. So I had to call boxed() here as well. Please check that the HTTP responses still work, for me, it looks fine.

[ChristianBeilschmidt]

Build-rs vereinfachen + 1 Clippy Lint

[coveralls]

Pull Request Test Coverage Report for Build 1605587521

• 19 of 21 (90.48%) changed or added relevant lines in 5 files are covered.
• 52 unchanged lines in 5 files lost coverage.
• Overall coverage increased (+0.07%) to 85.377%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
services/src/pro/util/tests.rs	1	2	50.0%
services/src/util/tests.rs	1	2	50.0%

Files with Coverage Reduction	New Missed Lines	%
datatypes/src/raster/grid.rs	2	77.31%
operators/src/processing/meteosat/reflectance.rs	4	97.76%
operators/src/processing/meteosat/mod.rs	12	77.5%
operators/src/processing/meteosat/radiance.rs	17	86.74%
operators/src/processing/meteosat/temperature.rs	17	92.16%

Totals
Change from base Build 1601209590:	0.07%
Covered Lines:	27563
Relevant Lines:	32284

---

💛 - Coveralls

[jdroenner]

bors merge

[bors]

Build succeeded:

• build (ubuntu-20.04)
• build (ubuntu-20.04, --all-features)
• build (ubuntu-20.04, --all-features, --release)
• build (ubuntu-20.04, --features pro)
• build (ubuntu-20.04, --features pro, --release)
• build (ubuntu-20.04, --release)
• clippy
• coverage