ci: Added "cargo test" command (#33)

Resolves #32

Co-authored-by: FroVolod <frol_off@meta.ua>

.github/workflows/tests.yml

@@ -0,0 +1,22 @@
+name: Tests
+on:
+  pull_request:
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  tests:
+    name: Tests
+    runs-on: ubuntu-20.04
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v2
+    - name: Install Rust
+      uses: actions-rs/toolchain@v1
+      with:
+        toolchain: stable
+        override: true
+        profile: minimal
+    - name: Tests
+      run: cargo test --workspace