Support BMA optimizations
- [x] Use DuniterPy dev from git - [x] Use optimizations: clients/python/duniterpy#201: Set `pubkey_query=True` to `wot` path - [x] `silkaj.money.tools::get_sources()`: `receiving`/pending transfers are no longer part of `bma.tx.sources`. Adapt `get_sources()`? - [x] Test all Silkaj commands against Duniter v1.8.7/BMA and Duniter v1.8.6 (for compatibility check) - [x] #483+
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