Use clap to parse keyset subcommands (#100)

Co-authored-by: Terts Diepraam <terts.diepraam@gmail.com>

.github/workflows/ci.yml

@@ -9,7 +9,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest, macOS-latest]
-        rust: [1.79.0, stable, beta, nightly]
+        rust: [1.82.0, stable, beta, nightly]
     env:
       RUSTFLAGS: "-D warnings"
       # We use 'vcpkg' to install OpenSSL on Windows.
@@ -53,7 +53,7 @@ jobs:
     - name: Install Rust
       uses: hecrj/setup-rust-action@v2
       with:
-        rust-version: "1.79.0"
+        rust-version: "1.82.0"
     - name: Install OpenSSL
       run: sudo apt-get install -y libssl-dev
     - name: Install nightly Rust