attempt to fix codecov

Author: qkniep

.travis.yml

@@ -33,7 +33,7 @@ before_script: |
 
 after_success: |
   if [[ "$TRAVIS_OS_NAME" == "linux" && "$TRAVIS_RUST_VERSION" == "stable" ]]; then
-    cargo tarpaulin --out Xml --lib -v
+    cargo tarpaulin --out Xml -v
     bash <(curl -s https://codecov.io/bash) &&
     echo "Uploaded code coverage"
   fi