Rework Cargo.toml, update Cargo.lock

[mkroening]

This

1. Moves the binary source from src/bin/uhyve.rs to its standard location src/main.rs.
2. Renames the lib target from uhyvelib to its standard uhyve.
3. Reworks the Cargo.toml and updates Cargo.lock.

[mkroening]

Rebased on latest master.

[codecov]

Codecov Report

Merging #136 (bb47734) into master (cf646df) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #136   +/-   ##
=======================================
  Coverage   33.65%   33.65%           
=======================================
  Files          17       17           
  Lines        3943     3943           
=======================================
  Hits         1327     1327           
  Misses       2616     2616           

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[jounathaen]

Because we plan to provide different frontends for uhyve, I'm against the move of bin/uhvye.rs to main.rs and the renaming.
I like the cleaned version of the Cargo.toml though!

[mkroening]

Will drop 1, 2.

Will research about cargo update and transitive dependencies and dependabot capabilities.

[mkroening]

Dropped 1, 2.

Regarding omitting the patch level of the SemVer in Cargo.toml.
Bumping a dependency in Cargo.toml only causes its dependencies to update in Cargo.lock, if it is required by the new version. Otherwise, the dependency's dependencies are not touched in Cargo.lock, even if newer patch versions of those are available. Thus, we should have Dependabot update the Cargo.lock regularly anyway, which he seems to support. The explicit updates in Cargo.toml can then be reduced if we omit the patch level of the SemVer.

[jounathaen]

I'm still unsure about how dependabot works. But we can test it and revert if it creates trouble :-)

[jounathaen]

bors r+

[bors]

Build succeeded:

• Build (macOS-latest, nightly)
• Build (ubuntu-latest, nightly)
• Cargo tests (macOS-latest, nightly)
• Cargo tests (ubuntu-latest, nightly)
• Format check (ubuntu-latest, nightly)
• KVM Tests
• Rusty-Hermit Kernel based integration tests
• Rusty-Hermit Kernel Tests