fix for github builds

Author: laisee

.github/workflows/ci.yml

@@ -17,4 +17,4 @@ jobs:
       with:
         toolchain: stable
     - name: Run tests
-      run: cargo test
+      run: cargo test -- --test-threads=1

.github/workflows/rust.yml

@@ -21,4 +21,4 @@ jobs:
       with:
         toolchain: ${{ matrix.rust }}
     - name: Run tests
-      run: cargo test
+      run: cargo test -- --test-threads=1