swap ci to use github actions

.github/workflows/rust.yml

@@ -0,0 +1,33 @@
+name: Tests
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  tests_2020:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Build
+      run: cd 2020 && cargo build --verbose
+    - name: Run tests
+      run: cd 2020 && cargo test --verbose
+      
+  tests_2021:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Build
+      run: cd 2021 && cargo build --verbose
+    - name: Run tests
+      run: cd 2021 && cargo test --verbose

.gitlab-ci.yml

@@ -1,14 +0,0 @@
-image: "rust:latest"
-
-# Use cargo to test the project
-test:2020:
-  script:
-    - cd 2020
-    - rustc --version && cargo --version  # Print version info for debugging
-    - cargo test --workspace --verbose -j 8
-
-test:2021:
-  script:
-    - cd 2021
-    - rustc --version && cargo --version  # Print version info for debugging
-    - cargo test --workspace --verbose -j 8