- Cleanup .travis.yml
- Loops over std/no_std targets
- Remove deprecated/useless keys
- No more `cd`, we just use `--package`.
- Improve tests
- Main `getrandom` tests are now unit test modules instead of
integration tests, making the code cleaner.
- The custom RNG crates now use this common module as part of their
integration tests.
- No more weird test-only features needed to get the crate to build.
Signed-off-by: Joe Richey <joerichey@google.com>