Build and test the entire workspace

With upcoming changes we will have not only the main crate (comprised of
two binaries), but an entire workspace containing extensions and other
support crates.
This change instructs the CI to build and test these crates as it does
for the main crate.

ci/gitlab-ci.yml

@@ -15,9 +15,9 @@ build-test:cargo:
   - apt-get update
   - apt-get install --assume-yes libudev-dev libhidapi-dev
   - rustc --version && cargo --version
-  - cargo build --bins --tests --verbose
-  - cargo build --bins --tests --verbose --release
-  - cargo test --verbose
+  - cargo build --workspace --bins --tests --verbose
+  - cargo build --workspace --bins --tests --verbose --release
+  - cargo test --workspace --verbose
 
 lint:clippy:
   script: