fix: export the KeyDerivationMethod

[berendsliedrecht]

Signed-off-by: Berend Sliedrecht berend@animo.id

[codecov-commenter]

Codecov Report

Merging #958 (860fee7) into main (d72a848) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff            @@
##             main     #958    +/-   ##
========================================
  Coverage   87.76%   87.76%            
========================================
  Files         475      475            
  Lines       11417    11417            
  Branches     1938     1804   -134     
========================================
  Hits        10020    10020            
- Misses       1332     1393    +61     
+ Partials       65        4    -61     

Impacted Files	Coverage Δ
packages/core/src/index.ts	100.00% <100.00%> (ø)
packages/node/src/NodeFileSystem.ts	37.14% <0.00%> (ø)
packages/core/src/crypto/JwsService.ts	90.90% <0.00%> (ø)
packages/core/src/utils/transformers.ts	79.16% <0.00%> (ø)
packages/core/src/agent/MessageSender.ts	84.61% <0.00%> (ø)
packages/core/src/agent/MessageReceiver.ts	80.76% <0.00%> (ø)
packages/core/src/modules/ledger/IndyPool.ts	82.92% <0.00%> (ø)
packages/core/src/modules/proofs/ProofsModule.ts	79.87% <0.00%> (ø)
packages/core/src/transport/WsOutboundTransport.ts	11.59% <0.00%> (ø)
...ckages/core/src/modules/routing/RecipientModule.ts	62.00% <0.00%> (ø)
... and 23 more

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