Use nucypher dkg-dev-15

[derekpierre]

Type of PR:

• Bugfix
• Feature
• Documentation
• Other

Required reviews:

• 1
• 2
• 3

What this does:

• Update Porter to use nucypher dkg-dev-15.
• Relock dependencies
• Update tests

Issues fixed/closed:

Why it's needed:

Explain how this PR fits in the greater context of the NuCypher Network.
E.g., if this PR addresses a nucypher/productdev issue, let reviewers know!

Notes for reviewers:

What should reviewers focus on?
Is there a particular commit/function/section of your PR that requires more attention from reviewers?

[codecov-commenter]

Codecov Report

Merging #39 (b954791) into development (a09a447) will decrease coverage by 0.02%.
The diff coverage is 92.85%.

@@               Coverage Diff               @@
##           development      #39      +/-   ##
===============================================
- Coverage        87.74%   87.72%   -0.02%     
===============================================
  Files               18       18              
  Lines              710      709       -1     
===============================================
- Hits               623      622       -1     
  Misses              87       87              

Files	Coverage Δ
porter/cli/main.py	97.91% <95.23%> (-0.05%)	⬇️
porter/main.py	87.21% <85.71%> (ø)

[KPrasch]

🤠