Update .travis.yml to fix FOSSA integration test

[yiranwang52]

Copying @apourchet fix for makisu repo

[codecov-io]

Codecov Report

Merging #191 into master will increase coverage by 0.04%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #191      +/-   ##
==========================================
+ Coverage   66.93%   66.97%   +0.04%     
==========================================
  Files         183      183              
  Lines        8985     8985              
==========================================
+ Hits         6014     6018       +4     
+ Misses       2203     2200       -3     
+ Partials      768      767       -1

Impacted Files	Coverage Δ
lib/torrent/storage/agentstorage/torrent.go	64.56% <0%> (-1.58%)	⬇️
lib/torrent/scheduler/events.go	72.59% <0%> (+1.44%)	⬆️
core/peer_info.go	88.88% <0%> (+5.55%)	⬆️
utils/dedup/interval_trap.go	100% <0%> (+10%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 253c470...97e4007. Read the comment docs.

[evelynl94]

i hope this work...