Use tarpaulin 0.13 to avoid failure

[JohnTitor]

No description provided.

[codecov]

Codecov Report

Merging #76 into master will increase coverage by 1.76%.
The diff coverage is 96.00%.

@@            Coverage Diff             @@
##           master      #76      +/-   ##
==========================================
+ Coverage   77.20%   78.97%   +1.76%     
==========================================
  Files          24       24              
  Lines        2005     2026      +21     
==========================================
+ Hits         1548     1600      +52     
+ Misses        457      426      -31     

Impacted Files	Coverage Δ
actix-web-httpauth/src/middleware.rs	75.00% <96.00%> (+75.00%)	⬆️
actix-web-httpauth/src/extractors/bearer.rs	10.52% <0.00%> (+10.52%)	⬆️
...x-web-httpauth/src/headers/authorization/header.rs	31.57% <0.00%> (+31.57%)	⬆️

---

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 027f045...6e132d9. Read the comment docs.