Make sure tests get run by coverage

.travis.yml

@@ -65,7 +65,8 @@ after_success: |
   make install DESTDIR=../../kcov-build &&
   cd ../.. &&
   rm -rf kcov-master &&
-  for file in target/debug/imap-*[^\.d]; do mkdir -p "target/cov/$(basename $file)"; ./kcov-build/usr/local/bin/kcov --exclude-pattern=/.cargo,/usr/lib --verify "target/cov/$(basename $file)" "$file"; done &&
+  ls target/debug/deps &&
+  for file in target/debug/deps/imap*[^\.d]; do mkdir -p "target/cov/$(basename $file)"; ./kcov-build/usr/local/bin/kcov --exclude-pattern=/.cargo,/usr/lib --verify "target/cov/$(basename $file)" "$file"; done &&
   bash <(curl -s https://codecov.io/bash) &&
   echo "Uploaded code coverage";
   fi