feat: add ClaimPredicateGroup, used to assemble the left and right values for and_predicates and or_predicates.

[overcat]

No description provided.

[codecov]

Codecov Report

Merging #374 into dev-protocol-14 will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@                 Coverage Diff                 @@
##           dev-protocol-14     #374      +/-   ##
===================================================
+ Coverage            98.98%   99.01%   +0.02%     
===================================================
  Files                  125      127       +2     
  Lines                 7501     7707     +206     
===================================================
+ Hits                  7425     7631     +206     
  Misses                  76       76              

Flag	Coverage Δ
#unittests	99.01% <100.00%> (+0.02%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
stellar_sdk/operation/create_claimable_balance.py	100.00% <100.00%> (ø)
tests/test_server.py	100.00% <0.00%> (ø)
stellar_sdk/call_builder/__init__.py	100.00% <0.00%> (ø)
tests/call_builder/test_offers_call_builder.py	100.00% <0.00%> (ø)
tests/call_builder/test_accounts_call_builder.py	100.00% <0.00%> (ø)
stellar_sdk/call_builder/accounts_call_builder.py	100.00% <0.00%> (ø)
...dk/call_builder/claimable_balances_call_builder.py	100.00% <0.00%> (ø)
...ll_builder/test_claimable_balances_call_builder.py	100.00% <0.00%> (ø)
stellar_sdk/server.py	98.73% <0.00%> (+0.62%)	⬆️
stellar_sdk/call_builder/offers_call_builder.py	90.62% <0.00%> (+0.96%)	⬆️