upgrade publicsuffix to v2

[rushmorem]

No description provided.

[codecov]

Codecov Report

Merging #312 (ff6c3e5) into master (d2830a2) will increase coverage by 0.16%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #312      +/-   ##
==========================================
+ Coverage   75.20%   75.37%   +0.16%     
==========================================
  Files          57       57              
  Lines        2977     2977              
==========================================
+ Hits         2239     2244       +5     
+ Misses        738      733       -5     

Impacted Files	Coverage Δ
src/cookies/psl/mod.rs	82.92% <100.00%> (ø)
src/headers.rs	60.00% <0.00%> (+6.66%)	⬆️
src/text.rs	81.39% <0.00%> (+9.30%)	⬆️

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[sagebind]

Thanks!