Add context support to Recipient.from_jwk.

[dajiaji]

No description provided.

[codecov]

Codecov Report

Merging #144 (bb53719) into main (7d33b8e) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #144   +/-   ##
=======================================
  Coverage   99.83%   99.83%           
=======================================
  Files          26       26           
  Lines        2368     2392   +24     
  Branches      626      634    +8     
=======================================
+ Hits         2364     2388   +24     
  Misses          4        4           

Impacted Files	Coverage Δ
cwt/recipient.py	100.00% <100.00%> (ø)
cwt/utils.py	100.00% <100.00%> (ø)

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