ci: test every language

Author: amaanq

.github/workflows/ci.yml

@@ -37,4 +37,8 @@ jobs:
       - name: Run tests
         uses: tree-sitter/parser-test-action@v2
         with:
-          test-rust: ${{runner.os == 'Linux'}}
+          test-rust: true
+          test-node: true
+          test-python: true
+          test-go: true
+          test-swift: true