Upload test logs on failure

Author: jneira

.github/workflows/test.yml

@@ -228,3 +228,10 @@ jobs:
       - if: ${{ needs.pre_job.outputs.should_skip != 'true' && matrix.test}}
         name: Test hls-hlint-plugin test suite
         run: cabal test hls-hlint-plugin --test-options="-j1 --rerun-update" || cabal test hls-hlint-plugin --test-options="-j1 --rerun" || LSP_TEST_LOG_COLOR=0 LSP_TEST_LOG_MESSAGES=true LSP_TEST_LOG_STDERR=true cabal test hls-hlint-plugin --test-options="-j1 --rerun"
+
+      - if: failure()
+        name: Upload test logs
+        uses: actions/upload-artifact@v2
+        with:
+          name: haskell-language-server-${{ runner.OS }}-${{ matrix.ghc }}
+          path: test-logs