fix(tests): run a single therad on appveyor tests

ashleygwilliams · ashleygwilliams · commit c3686a5b2556 · 2018-07-16T12:33:10.000-04:00
diff --git a/.appveyor.yml b/.appveyor.yml
@@ -8,7 +8,7 @@ install:
 build: false
 
 test_script:
-  - cargo test --locked
+  - cargo test --locked -- --test-threads 1
 
 before_deploy:
   - ps: |
