pass token explicitly

Author: masci

.drone.yml

@@ -23,5 +23,5 @@ steps:
   commands:
     - task test
     - task test-legacy
-    - codecov -cF unit -f '*_unit.txt'
-    - codecov -cF integ -f '*_integ.txt'
+    - codecov -cF unit -f coverage_unit.txt -t $CODECOV_TOKEN
+    - codecov -cF integ -f coverage_integ.txt -t $CODECOV_TOKEN